diff --git a/README.md b/README.md
index 9c4dabb..4ddedaf 100644
--- a/README.md
+++ b/README.md
@@ -264,4 +264,17 @@ public class Service
 
     private bool IsValid() => throw new NotImplementedException();
 }
+```
+
+## Configuration
+|Property|Default|Description|
+|--|--|--|
+|UnionTypesGenerator_ExcludeFromCodeCoverage|true|Add [ExcludeFromCodeCoverage]([https://](https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.codeanalysis.excludefromcodecoverageattribute?view=net-8.0)) attribute when `true`|
+
+```xml
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <UnionTypesGenerator_ExcludeFromCodeCoverage>false</UnionTypesGenerator_ExcludeFromCodeCoverage>
+    </PropertyGroup>
+</Project>
 ```
\ No newline at end of file
diff --git a/examples/BusinessLogic/BusinessLogic.csproj b/examples/BusinessLogic/BusinessLogic.csproj
index 5ca2a0d..d05a052 100644
--- a/examples/BusinessLogic/BusinessLogic.csproj
+++ b/examples/BusinessLogic/BusinessLogic.csproj
@@ -1,4 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <UnionTypesGenerator_ExcludeFromCodeCoverage>false</UnionTypesGenerator_ExcludeFromCodeCoverage>
+    </PropertyGroup>
 
     <ItemGroup>
         <ProjectReference Include="..\..\src\N.SourceGenerators.UnionTypes\N.SourceGenerators.UnionTypes.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
diff --git a/src/N.SourceGenerators.UnionTypes/Extensions/SyntaxNodeExtensions.cs b/src/N.SourceGenerators.UnionTypes/Extensions/SyntaxNodeExtensions.cs
index b9546d1..36d2161 100644
--- a/src/N.SourceGenerators.UnionTypes/Extensions/SyntaxNodeExtensions.cs
+++ b/src/N.SourceGenerators.UnionTypes/Extensions/SyntaxNodeExtensions.cs
@@ -1,4 +1,6 @@
-namespace N.SourceGenerators.UnionTypes.Extensions;
+using N.SourceGenerators.UnionTypes.Models;
+
+namespace N.SourceGenerators.UnionTypes.Extensions;
 
 internal static class SyntaxNodeExtensions
 {
@@ -9,7 +11,7 @@ public static bool IsTypeWithAttributes(this SyntaxNode s)
             AttributeLists.Count: > 0
         };
     }
-    
+
     public static bool IsGenericTypeAttribute(this SyntaxNode s)
     {
         if (s is not TypeParameterSyntax typeParameter)
@@ -29,7 +31,7 @@ public static bool IsPartial(this TypeDeclarationSyntax s)
     {
         return s.Modifiers.Any(SyntaxKind.PartialKeyword);
     }
-    
+
     public static AwaitExpressionSyntax AwaitWithConfigureAwait(this ExpressionSyntax expression)
     {
         return AwaitExpression(
@@ -44,4 +46,21 @@ public static AwaitExpressionSyntax AwaitWithConfigureAwait(this ExpressionSynta
             )
         );
     }
+
+    public static TSyntax ExcludeFromCodeCoverage<TSyntax>(this TSyntax node, GeneratorOptions options)
+        where TSyntax : BaseTypeDeclarationSyntax
+    {
+        if (!options.ExcludeFromCodeCoverage)
+        {
+            return node;
+        }
+
+        AttributeListSyntax attributeList = AttributeList()
+            .AddAttributes(
+                Attribute(IdentifierName("System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage"))
+            );
+
+
+        return (TSyntax)node.AddAttributeLists(attributeList);
+    }
 }
\ No newline at end of file
diff --git a/src/N.SourceGenerators.UnionTypes/Models/CompilationContext.cs b/src/N.SourceGenerators.UnionTypes/Models/CompilationContext.cs
deleted file mode 100644
index edb63f5..0000000
--- a/src/N.SourceGenerators.UnionTypes/Models/CompilationContext.cs
+++ /dev/null
@@ -1,7 +0,0 @@
-namespace N.SourceGenerators.UnionTypes.Models;
-
-internal record CompilationContext(
-    bool SupportsNotNullWhenAttribute, 
-    bool SupportsThrowIfNull, 
-    bool NullableContextEnabled,
-    bool SupportsAutoDefaultField);
\ No newline at end of file
diff --git a/src/N.SourceGenerators.UnionTypes/Models/GeneratorContext.cs b/src/N.SourceGenerators.UnionTypes/Models/GeneratorContext.cs
new file mode 100644
index 0000000..ce45164
--- /dev/null
+++ b/src/N.SourceGenerators.UnionTypes/Models/GeneratorContext.cs
@@ -0,0 +1,11 @@
+namespace N.SourceGenerators.UnionTypes.Models;
+
+internal record GeneratorContext(CompilationContext Compilation, GeneratorOptions Options);
+
+internal record CompilationContext(
+    bool SupportsNotNullWhenAttribute,
+    bool SupportsThrowIfNull,
+    bool NullableContextEnabled,
+    bool SupportsAutoDefaultField);
+
+internal record GeneratorOptions(bool ExcludeFromCodeCoverage);
\ No newline at end of file
diff --git a/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.csproj b/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.csproj
index f2a0175..33cc708 100644
--- a/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.csproj
+++ b/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.csproj
@@ -10,7 +10,7 @@
         <IsRoslynComponent>true</IsRoslynComponent>
         <IsPackable>true</IsPackable>
         <PackageOutputPath>./nupkg</PackageOutputPath>
-        <VersionPrefix>0.27.0</VersionPrefix>
+        <VersionPrefix>0.28.0</VersionPrefix>
         <EnableNETAnalyzers>true</EnableNETAnalyzers>
         <NoWarn>$(NoWarn);NU5128</NoWarn>
     </PropertyGroup>
@@ -25,6 +25,10 @@
         <Description>Discriminated union type source generator</Description>
         <PackageReadmeFile>README.md</PackageReadmeFile>
     </PropertyGroup>
+    
+    <PropertyGroup>
+        <UnionTypesGenerator_ExcludeFromCodeCoverage>true</UnionTypesGenerator_ExcludeFromCodeCoverage>
+    </PropertyGroup>
 
     <ItemGroup>
         <None Include="../../README.md" Pack="true" PackagePath="\" />
@@ -33,6 +37,9 @@
     <ItemGroup>
         <!-- Package the generator in the analyzer directory of the nuget package -->
         <None Include="$(OutputPath)\$(AssemblyName).dll" Pack="true" PackagePath="analyzers/dotnet/cs" Visible="false" />
+
+        <!-- Package the props file -->
+        <None Include="N.SourceGenerators.UnionTypes.props" Pack="true" PackagePath="build" Visible="false" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.props b/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.props
new file mode 100644
index 0000000..fed9bed
--- /dev/null
+++ b/src/N.SourceGenerators.UnionTypes/N.SourceGenerators.UnionTypes.props
@@ -0,0 +1,5 @@
+<Project>
+    <ItemGroup>
+        <CompilerVisibleProperty Include="UnionTypesGenerator_ExcludeFromCodeCoverage" />
+    </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Attributes.cs b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Attributes.cs
index d3350ef..2078704 100644
--- a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Attributes.cs
+++ b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Attributes.cs
@@ -24,6 +24,7 @@ public partial class UnionTypesGenerator
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             internal sealed class UnionTypeAttribute : Attribute
             {
                 public Type Type { get; }
@@ -65,6 +66,7 @@ public UnionTypeAttribute(Type type, string alias = null, [CallerLineNumber] int
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             internal sealed class GenericUnionTypeAttribute : Attribute
             {
         #if NETCOREAPP3_1_OR_GREATER
@@ -91,6 +93,7 @@ internal sealed class GenericUnionTypeAttribute : Attribute
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             internal sealed class JsonPolymorphicUnionAttribute : Attribute
             {
         #if NETCOREAPP3_1_OR_GREATER
@@ -113,6 +116,7 @@ internal sealed class JsonPolymorphicUnionAttribute : Attribute
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             sealed class UnionConverterFromAttribute : Attribute
             {
                 public Type FromType { get; }
@@ -136,6 +140,7 @@ public UnionConverterFromAttribute(Type fromType)
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             sealed class UnionConverterToAttribute : Attribute
             {
                 public Type ToType { get; }
@@ -158,6 +163,7 @@ public UnionConverterToAttribute(Type toType)
         namespace N.SourceGenerators.UnionTypes
         {
             [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+            [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
             sealed class UnionConverterAttribute : Attribute
             {
                 public Type FromType { get; }
diff --git a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Converters.cs b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Converters.cs
index 6d38a5c..d7ab7b2 100644
--- a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Converters.cs
+++ b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Converters.cs
@@ -9,30 +9,30 @@ namespace N.SourceGenerators.UnionTypes;
 public sealed partial class UnionTypesGenerator
 {
     private static void GenerateConverters(IncrementalGeneratorInitializationContext context,
-        IncrementalValueProvider<CompilationContext> compilationContextProvider)
+        IncrementalValueProvider<GeneratorContext> generatorContextProvider)
     {
         var toConverters = GetUnionConverters(
             context,
             UnionConverterToAttributeName,
             (containerType, otherTypes) => new UnionToConverter(containerType, otherTypes));
-        ProcessConverters(context, toConverters, compilationContextProvider);
+        ProcessConverters(context, toConverters, generatorContextProvider);
 
         var fromConverters = GetUnionConverters(
             context,
             UnionConverterFromAttributeName,
             (containerType, otherTypes) => new UnionFromConverter(containerType, otherTypes));
-        ProcessConverters(context, fromConverters, compilationContextProvider);
+        ProcessConverters(context, fromConverters, generatorContextProvider);
 
         var unionConverters = GetUnionConverters(context);
-        ProcessConverters(context, unionConverters, compilationContextProvider);
+        ProcessConverters(context, unionConverters, generatorContextProvider);
     }
 
     private static void ProcessConverters(
         IncrementalGeneratorInitializationContext context,
         IncrementalValuesProvider<UnionConverter> unionConverters,
-        IncrementalValueProvider<CompilationContext> compilationContextProvider)
+        IncrementalValueProvider<GeneratorContext> generatorContextProvider)
     {
-        var combination = unionConverters.Combine(compilationContextProvider);
+        var combination = unionConverters.Combine(generatorContextProvider);
         
         context.RegisterImplementationSourceOutput(
             combination,
@@ -81,7 +81,7 @@ private static void ProcessConverters(
 
                 if (saveSource)
                 {
-                    CompilationUnitSyntax compilationUnit = GetCompilationUnit(typeDeclaration, unionConverter.Namespace, item.Right);
+                    CompilationUnitSyntax compilationUnit = GetCompilationUnit(typeDeclaration, unionConverter.Namespace, item.Right.Compilation);
                     ctx.AddSource($"{unionConverter.Name}Converters.g.cs", compilationUnit.GetText(Encoding.UTF8));
                 }
             });
@@ -173,10 +173,10 @@ private static IncrementalValuesProvider<UnionConverter> GetUnionConverters(
 
     private static void ProcessConverters<T>(IncrementalGeneratorInitializationContext context,
         IncrementalValuesProvider<T> fromConverters,
-        IncrementalValueProvider<CompilationContext> compilationContextProvider)
+        IncrementalValueProvider<GeneratorContext> generatorContextProvider)
         where T : IUnionConverter
     {
-        var combination = fromConverters.Combine(compilationContextProvider);
+        var combination = fromConverters.Combine(generatorContextProvider);
         
         context.RegisterImplementationSourceOutput(
             combination,
@@ -210,7 +210,7 @@ private static void ProcessConverters<T>(IncrementalGeneratorInitializationConte
                 if (saveSource)
                 {
                     CompilationUnitSyntax compilationUnit =
-                        GetCompilationUnit(typeDeclaration, containerType.Namespace, item.Right);
+                        GetCompilationUnit(typeDeclaration, containerType.Namespace, item.Right.Compilation);
                     ctx.AddSource(unionConverter.SourceHintName, compilationUnit.GetText(Encoding.UTF8));
                 }
             });
diff --git a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Json.cs b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Json.cs
index 3136185..8a2f3b0 100644
--- a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Json.cs
+++ b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.Json.cs
@@ -8,16 +8,16 @@ namespace N.SourceGenerators.UnionTypes;
 public sealed partial class UnionTypesGenerator
 {
     private static void GenerateJsonConverter(UnionType unionType,
-        SourceProductionContext context, 
-        CompilationContext compilationContext)
+        SourceProductionContext context,
+        GeneratorContext generatorContext)
     {
         context.CancellationToken.ThrowIfCancellationRequested();
-        BuildJsonConverter(unionType, context, compilationContext);
+        BuildJsonConverter(unionType, context, generatorContext);
         context.CancellationToken.ThrowIfCancellationRequested();
-        BuildJsonConverterAttribute(unionType, context, compilationContext);
+        BuildJsonConverterAttribute(unionType, context, generatorContext);
     }
 
-    private static void BuildJsonConverter(UnionType unionType, SourceProductionContext context, CompilationContext compilationContext)
+    private static void BuildJsonConverter(UnionType unionType, SourceProductionContext context, GeneratorContext generatorContext)
     {
         TypeDeclarationSyntax converterDeclaration = ClassDeclaration(unionType.Name + "JsonConverter")
             .AddModifiers(Token(SyntaxKind.InternalKeyword))
@@ -26,6 +26,7 @@ private static void BuildJsonConverter(UnionType unionType, SourceProductionCont
                     GenericType("System.Text.Json.Serialization.JsonConverter", unionType.Name)
                 )
             )
+            .ExcludeFromCodeCoverage(generatorContext.Options)
             .AddMembers(
                 GetDiscriminatorMethod(unionType),
                 AddDiscriminatorModifier(unionType),
@@ -34,11 +35,11 @@ private static void BuildJsonConverter(UnionType unionType, SourceProductionCont
                 WriteJsonConverterMethod(unionType)
             );
 
-        CompilationUnitSyntax compilationUnit = GetCompilationUnit(converterDeclaration, unionType.Namespace, compilationContext);
+        CompilationUnitSyntax compilationUnit = GetCompilationUnit(converterDeclaration, unionType.Namespace, generatorContext.Compilation);
         context.AddSource($"{unionType.SourceCodeFileName}JsonConverter.g.cs", compilationUnit.GetText(Encoding.UTF8));
     }
 
-    private static void BuildJsonConverterAttribute(UnionType unionType, SourceProductionContext context, CompilationContext compilationContext)
+    private static void BuildJsonConverterAttribute(UnionType unionType, SourceProductionContext context, GeneratorContext generatorContext)
     {
         TypeDeclarationSyntax converterDeclaration = ClassDeclaration(unionType.Name + "JsonConverterAttribute")
             .AddModifiers(
@@ -48,6 +49,7 @@ private static void BuildJsonConverterAttribute(UnionType unionType, SourceProdu
                     IdentifierName("System.Text.Json.Serialization.JsonConverterAttribute")
                 )
             )
+            .ExcludeFromCodeCoverage(generatorContext.Options)
             .AddMembers(
                 MethodDeclaration(
                         NullableType(IdentifierName("System.Text.Json.Serialization.JsonConverter")),
@@ -67,7 +69,7 @@ private static void BuildJsonConverterAttribute(UnionType unionType, SourceProdu
                     )
             );
 
-        CompilationUnitSyntax compilationUnit = GetCompilationUnit(converterDeclaration, unionType.Namespace, compilationContext);
+        CompilationUnitSyntax compilationUnit = GetCompilationUnit(converterDeclaration, unionType.Namespace, generatorContext.Compilation);
         context.AddSource($"{unionType.SourceCodeFileName}JsonConverterAttribute.g.cs",
             compilationUnit.GetText(Encoding.UTF8));
     }
diff --git a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.cs b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.cs
index 8f4bba0..2d85af8 100644
--- a/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.cs
+++ b/src/N.SourceGenerators.UnionTypes/UnionTypesGenerator.cs
@@ -19,10 +19,25 @@ public sealed partial class UnionTypesGenerator : IIncrementalGenerator
         // </auto-generated>
         """;
 
+    public const string ExcludeFromCodeCoverageOption = "build_property.UnionTypesGenerator_ExcludeFromCodeCoverage";
+
     public void Initialize(IncrementalGeneratorInitializationContext context)
     {
         AddAttributesSource(context);
-        
+
+        var generatorOptionsProvider = context.AnalyzerConfigOptionsProvider.Select((options, ct) =>
+        {
+            ct.ThrowIfCancellationRequested();
+            bool excludeFromCodeCoverage = true;
+            if (options.GlobalOptions.TryGetValue(ExcludeFromCodeCoverageOption, out var optionValue)
+                && optionValue.Equals("false", StringComparison.OrdinalIgnoreCase))
+            {
+                excludeFromCodeCoverage = false;
+            }
+
+            return new GeneratorOptions(excludeFromCodeCoverage);
+        });
+
         var compilationContextProvider = context.CompilationProvider.Select((compilation, ct) =>
         {
             ct.ThrowIfCancellationRequested();
@@ -36,6 +51,9 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
             return compilationContext;
         });
 
+        var generatorContextProvider = generatorOptionsProvider.Combine(compilationContextProvider)
+            .Select((a, ct) => new GeneratorContext(a.Right, a.Left));
+
         var unionTypes = GetUnionTypes(context);
         var genericUnionTypes = GetGenericUnionTypes(context);
 
@@ -45,20 +63,20 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
             .SelectMany(ProcessCollections);
 
         var unionTypeDiagnostics = GetUnionTypeDiagnostics(uniqueUnionTypes);
-        ProcessValues(context, compilationContextProvider, unionTypeDiagnostics, GenerateUnionType);
+        ProcessValues(context, generatorContextProvider, unionTypeDiagnostics, GenerateUnionType);
 
         var jsonTypes = unionTypeDiagnostics
             .Where(vd => vd.Diagnostics.Count == 0)
             .Where(vd => vd.Value.GenerateJsonConverter);
 
-        var jsonTypesCombination = jsonTypes.Combine(compilationContextProvider);
+        var jsonTypesCombination = jsonTypes.Combine(generatorContextProvider);
 
         // TODO test System.Text.Json is available, add diagnostics
         context.RegisterImplementationSourceOutput(
             jsonTypesCombination,
             (ctx, item) => { GenerateJsonConverter(item.Left.Value, ctx, item.Right); });
 
-        GenerateConverters(context, compilationContextProvider);
+        GenerateConverters(context, generatorContextProvider);
     }
 
     private IEnumerable<UnionType> ProcessCollections(
@@ -235,10 +253,11 @@ bool GetAllowNullValue(AttributeData attribute)
     }
 
     static void GenerateUnionType(UnionType unionType,
-        CompilationContext compilationContext,
+        GeneratorContext generatorContext,
         SourceProductionContext context)
     {
         context.CancellationToken.ThrowIfCancellationRequested();
+        CompilationContext compilationContext = generatorContext.Compilation;
 
         TypeDeclarationSyntax typeDeclaration = unionType.IsReferenceType
             ? ClassDeclaration(unionType.Name)
@@ -247,6 +266,7 @@ static void GenerateUnionType(UnionType unionType,
         typeDeclaration = typeDeclaration
             .AddAttributeLists(GetTypeAttributes(unionType))
             .AddModifiers(Token(SyntaxKind.PartialKeyword))
+            .ExcludeFromCodeCoverage(generatorContext.Options)
             .AddMembers(VariantIdField(unionType.UseStructLayout))
             .AddMembers(VariantsMembers(unionType, compilationContext))
             .AddMembers(
@@ -282,9 +302,9 @@ static void GenerateUnionType(UnionType unionType,
     }
 
     private static CompilationUnitSyntax GetCompilationUnit(TypeDeclarationSyntax typeDeclaration,
-        string? typeNamespace, CompilationContext compilationContext)
+        string? typeNamespace, CompilationContext context)
     {
-        SyntaxTriviaList syntaxTriviaList = GetTriviaList(compilationContext);
+        SyntaxTriviaList syntaxTriviaList = GetTriviaList(context);
 
         CompilationUnitSyntax compilationUnit;
         if (typeNamespace is null)
@@ -310,17 +330,17 @@ private static CompilationUnitSyntax GetCompilationUnit(TypeDeclarationSyntax ty
     private static SyntaxTriviaList GetTriviaList(CompilationContext compilationContext)
     {
         return TriviaList(
-            Comment(AutoGeneratedComment),
-            Trivia(PragmaWarningDirectiveTrivia(Token(SyntaxKind.DisableKeyword), true)))
+                Comment(AutoGeneratedComment),
+                Trivia(PragmaWarningDirectiveTrivia(Token(SyntaxKind.DisableKeyword), true)))
             .AddWhen(
-                compilationContext.NullableContextEnabled, 
+                compilationContext.NullableContextEnabled,
                 Trivia(NullableDirectiveTrivia(Token(SyntaxKind.EnableKeyword), true)));
     }
 
     private static void ProcessValues<T>(IncrementalGeneratorInitializationContext context,
-        IncrementalValueProvider<CompilationContext> compilationContextProvider,
+        IncrementalValueProvider<GeneratorContext> compilationContextProvider,
         IncrementalValuesProvider<ValueDiagnostics<T>> valueDiagnostics,
-        Action<T, CompilationContext, SourceProductionContext> processAction)
+        Action<T, GeneratorContext, SourceProductionContext> processAction)
     {
         ReportDiagnostics(context, valueDiagnostics);
 
@@ -334,9 +354,9 @@ private static void ProcessValues<T>(IncrementalGeneratorInitializationContext c
             (ctx, item) =>
             {
                 ValueDiagnostics<T> diagnostics = item.Left;
-                CompilationContext compilationContext = item.Item2;
+                GeneratorContext generatorContext = item.Item2;
 
-                processAction(diagnostics.Value, compilationContext, ctx);
+                processAction(diagnostics.Value, generatorContext, ctx);
             });
     }
 
@@ -558,7 +578,7 @@ private static MemberDeclarationSyntax Ctor(UnionType unionType, UnionTypeVarian
             .AddBodyStatementsWhen(!unionType.UseStructLayout && !variant.AllowNull && compilationContext.SupportsThrowIfNull,
                 ExpressionStatement(checkArgumentExpression))
             .AddBodyStatementsWhen(!unionType.UseStructLayout && !variant.AllowNull && !compilationContext.SupportsThrowIfNull,
-                checkArgumentLegacy)            
+                checkArgumentLegacy)
             .AddBodyStatements(
                 ExpressionStatement(SimpleAssignmentExpression(
                     VariantIdFieldName,
@@ -567,7 +587,7 @@ private static MemberDeclarationSyntax Ctor(UnionType unionType, UnionTypeVarian
                 ExpressionStatement(assignmentExpression)
             )
             .AddBodyStatementsWhen(
-                !compilationContext.SupportsAutoDefaultField && unionType.IsValueType, 
+                !compilationContext.SupportsAutoDefaultField && unionType.IsValueType,
                 initOtherVariants.Cast<StatementSyntax>().ToArray());
     }
 
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorAnalyzerConfigOptionsProvider.cs b/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorAnalyzerConfigOptionsProvider.cs
new file mode 100644
index 0000000..e921e0a
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorAnalyzerConfigOptionsProvider.cs
@@ -0,0 +1,24 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace N.SourceGenerators.UnionTypes.Tests;
+
+public class GeneratorAnalyzerConfigOptionsProvider : AnalyzerConfigOptionsProvider
+{
+    public GeneratorAnalyzerConfigOptionsProvider(AnalyzerConfigOptions? globalOptions)
+    {
+        GlobalOptions = globalOptions ?? UnionTypesAnalyzerConfigOptions.Default;
+    }
+
+    public override AnalyzerConfigOptions GetOptions(SyntaxTree tree)
+    {
+        return UnionTypesAnalyzerConfigOptions.Default;
+    }
+
+    public override AnalyzerConfigOptions GetOptions(AdditionalText textFile)
+    {
+        return UnionTypesAnalyzerConfigOptions.Default;
+    }
+
+    public override AnalyzerConfigOptions GlobalOptions { get; }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorTests.cs b/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorTests.cs
index 63be26c..d973967 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorTests.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/GeneratorTests.cs
@@ -6,10 +6,13 @@ namespace N.SourceGenerators.UnionTypes.Tests;
 public class GeneratorTests
 {
     [Theory]
-    [InlineData("partial class")]
-    [InlineData("partial struct")]
-    [InlineData("readonly partial struct")]
-    public Task WithoutNamespace(string typeModifiers)
+    [InlineData("partial class", true)]
+    [InlineData("partial struct", true)]
+    [InlineData("readonly partial struct", true)]
+    [InlineData("partial class", false)]
+    [InlineData("partial struct", false)]
+    [InlineData("readonly partial struct", false)]    
+    public Task WithoutNamespace(string typeModifiers, bool excludeCodeCoverage)
     {
         string source = $$"""           
 using System;
@@ -28,7 +31,13 @@ public record Wrapped<TItem>(TItem Item);
 }
 """;
 
-        return TestHelper.Verify<UnionTypesGenerator>(source, LanguageVersion.Latest, typeModifiers.Replace(' ', '-'));
+        UnionTypesAnalyzerConfigOptions analyzerOptions = new() { ExcludeFromCodeCoverage = excludeCodeCoverage };
+
+        return TestHelper.Verify<UnionTypesGenerator>(
+            source, 
+            LanguageVersion.Latest, 
+            typeModifiers.Replace(' ', '-') + $"-exclude-{excludeCodeCoverage}",
+            analyzerOptions);
     }
 
     [Theory]
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/JsonTests.cs b/tests/N.SourceGenerators.UnionTypes.Tests/JsonTests.cs
index 417d3fe..89c0014 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/JsonTests.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/JsonTests.cs
@@ -38,6 +38,7 @@ public partial class JsonTestsUnion
             source, 
             LanguageVersion.Latest,
             null,
+            null,
             MetadataReference.CreateFromFile(Assembly.Load(new AssemblyName("System.Runtime")).Location),
             MetadataReference.CreateFromFile(Assembly.Load(new AssemblyName("System.Text.Json")).Location),
             MetadataReference.CreateFromFile(Assembly.Load(new AssemblyName("System.Text.Encodings.Web")).Location)
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#BusinessLogicResult.g.verified.cs
index 9deaf48..ae7fcfd 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverter#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
index 469be40..e6b0955 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#BusinessLogicResult.g.verified.cs
index 9deaf48..ae7fcfd 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverter#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
index 469be40..e6b0955 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.FromConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#BusinessLogicResult.g.verified.cs
index 9deaf48..ae7fcfd 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverter#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
index 469be40..e6b0955 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.StaticExternalConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#BusinessLogicResult.g.verified.cs
index 9deaf48..ae7fcfd 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverter#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
index 373f5b7..7def6e7 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#BusinessLogicResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicResult : System.IEquatable<BusinessLogicResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#DataAccessResult.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#DataAccessResult.g.verified.cs
index 516e30f..f303a5e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#DataAccessResult.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#DataAccessResult.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessResult : System.IEquatable<DataAccessResult>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/ConverterGeneratorTests.ToConverterReportsDiagnostic#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.InvalidTypeReportsAllDiagnostics#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.NotPartialTypeReportsDiagnostics#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantAliasDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantOrderDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/DiagnosticTests.VariantTypeDuplicateReportsDiagnostics#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#Result.g.verified.cs
index 0ce6bf1..3c584da 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#Result.g.verified.cs
@@ -6,6 +6,7 @@
 #pragma warning disable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-class#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#Result.g.verified.cs
index b301b3c..7a30a26 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#Result.g.verified.cs
@@ -6,6 +6,7 @@
 #pragma warning disable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.CSharp73_partial-struct#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#Result.g.verified.cs
index e1f4e61..0c29285 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp.Domain.Child
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DifferentNamespaces#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#Result.g.verified.cs
index 851621a..acc45de 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-class#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#Result.g.verified.cs
index c2f27bf..00850a4 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_partial-struct#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#Result.g.verified.cs
index c2f27bf..00850a4 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.DoNotOverrideToString_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#Result.g.verified.cs
index 9ecb3fd..21aefbe 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#Result.g.verified.cs
@@ -8,6 +8,7 @@
 namespace MyApp
 {
     [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Explicit)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         [System.Runtime.InteropServices.FieldOffset(0)]
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.ExplicitStructLayout#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#Result.g.verified.cs
index b6b9945..b524556 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-class#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#Result.g.verified.cs
index cb39346..e1cad04 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_partial-struct#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#Result.g.verified.cs
index cb39346..e1cad04 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#Result.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace MyApp
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial struct Result : System.IEquatable<Result>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#GenericUnionTypeAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
similarity index 92%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#Result.g.verified.cs
similarity index 100%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#Result.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#Result.g.verified.cs
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterFromAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterToAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionTypeAttribute.g.verified.cs
similarity index 95%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-False#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#GenericUnionTypeAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
similarity index 92%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#Result.g.verified.cs
new file mode 100644
index 0000000..e15e5f9
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#Result.g.verified.cs
@@ -0,0 +1,311 @@
+//HintName: Result.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#pragma warning disable
+#nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+partial class Result : System.IEquatable<Result>
+{
+    private readonly int _variantId;
+    private const int SuccessId = 1;
+    private readonly global::Success _success;
+    public bool IsSuccess => _variantId == SuccessId;
+    public global::Success AsSuccess
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return _success;
+            throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {ValueAlias} not Success.");
+        }
+    }
+
+    public Result(global::Success success)
+    {
+        System.ArgumentNullException.ThrowIfNull(success);
+        _variantId = SuccessId;
+        _success = success;
+    }
+
+    public static implicit operator Result(global::Success success) => new Result(success);
+    public static explicit operator global::Success(Result value)
+    {
+        if (value._variantId == SuccessId)
+            return value._success;
+        throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {value.ValueAlias} not Success.");
+    }
+
+    public bool TryGetSuccess([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Success value)
+    {
+        if (_variantId == SuccessId)
+        {
+            value = _success;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int ErrorId = 2;
+    private readonly global::Error _error;
+    public bool IsError => _variantId == ErrorId;
+    public global::Error AsError
+    {
+        get
+        {
+            if (_variantId == ErrorId)
+                return _error;
+            throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {ValueAlias} not Error.");
+        }
+    }
+
+    public Result(global::Error @error)
+    {
+        System.ArgumentNullException.ThrowIfNull(@error);
+        _variantId = ErrorId;
+        _error = @error;
+    }
+
+    public static implicit operator Result(global::Error @error) => new Result(@error);
+    public static explicit operator global::Error(Result value)
+    {
+        if (value._variantId == ErrorId)
+            return value._error;
+        throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {value.ValueAlias} not Error.");
+    }
+
+    public bool TryGetError([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Error value)
+    {
+        if (_variantId == ErrorId)
+        {
+            value = _error;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int WrappedOfIReadOnlyListOfStringId = 3;
+    private readonly global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> _wrappedOfIReadOnlyListOfString;
+    public bool IsWrappedOfIReadOnlyListOfString => _variantId == WrappedOfIReadOnlyListOfStringId;
+    public global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> AsWrappedOfIReadOnlyListOfString
+    {
+        get
+        {
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return _wrappedOfIReadOnlyListOfString;
+            throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {ValueAlias} not WrappedOfIReadOnlyListOfString.");
+        }
+    }
+
+    public Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString)
+    {
+        System.ArgumentNullException.ThrowIfNull(wrappedOfIReadOnlyListOfString);
+        _variantId = WrappedOfIReadOnlyListOfStringId;
+        _wrappedOfIReadOnlyListOfString = wrappedOfIReadOnlyListOfString;
+    }
+
+    public static implicit operator Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString) => new Result(wrappedOfIReadOnlyListOfString);
+    public static explicit operator global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>(Result value)
+    {
+        if (value._variantId == WrappedOfIReadOnlyListOfStringId)
+            return value._wrappedOfIReadOnlyListOfString;
+        throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {value.ValueAlias} not WrappedOfIReadOnlyListOfString.");
+    }
+
+    public bool TryGetWrappedOfIReadOnlyListOfString([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> value)
+    {
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            value = _wrappedOfIReadOnlyListOfString;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    public TOut Match<TOut>(global::System.Func<global::Success, TOut> matchSuccess, global::System.Func<global::Error, TOut> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, TOut> matchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+            return matchSuccess(_success);
+        if (_variantId == ErrorId)
+            return matchError(_error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task<TOut> MatchAsync<TOut>(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+            return await matchSuccess(_success, ct).ConfigureAwait(false);
+        if (_variantId == ErrorId)
+            return await matchError(_error, ct).ConfigureAwait(false);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return await matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public void Switch(global::System.Action<global::Success> switchSuccess, global::System.Action<global::Error> switchError, global::System.Action<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>> switchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+        {
+            switchSuccess(_success);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            switchError(_error);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task SwitchAsync(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+        {
+            await switchSuccess(_success, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            await switchError(_error, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            await switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public global::System.Type ValueType
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return typeof(global::Success);
+            if (_variantId == ErrorId)
+                return typeof(global::Error);
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return typeof(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>);
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    private string ValueAlias
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return "Success";
+            if (_variantId == ErrorId)
+                return "Error";
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return "WrappedOfIReadOnlyListOfString";
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    public override int GetHashCode()
+    {
+        if (_variantId == SuccessId)
+            return _success.GetHashCode();
+        if (_variantId == ErrorId)
+            return _error.GetHashCode();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.GetHashCode();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public static bool operator ==(Result? left, Result? right)
+    {
+        return Equals(left, right);
+    }
+
+    public static bool operator !=(Result? left, Result? right)
+    {
+        return !Equals(left, right);
+    }
+
+    public bool Equals(Result? other)
+    {
+        if (ReferenceEquals(null, other))
+        {
+            return false;
+        }
+
+        if (ReferenceEquals(this, other))
+        {
+            return true;
+        }
+
+        if (ValueType != other.ValueType)
+        {
+            return false;
+        }
+
+        if (_variantId == SuccessId)
+            return System.Collections.Generic.EqualityComparer<global::Success>.Default.Equals(_success, other._success);
+        if (_variantId == ErrorId)
+            return System.Collections.Generic.EqualityComparer<global::Error>.Default.Equals(_error, other._error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return System.Collections.Generic.EqualityComparer<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>>.Default.Equals(_wrappedOfIReadOnlyListOfString, other._wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override string ToString()
+    {
+        if (_variantId == SuccessId)
+            return _success.ToString();
+        if (_variantId == ErrorId)
+            return _error.ToString();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.ToString();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override bool Equals(object? other)
+    {
+        if (ReferenceEquals(null, other))
+        {
+            return false;
+        }
+
+        if (ReferenceEquals(this, other))
+        {
+            return true;
+        }
+
+        if (other.GetType() != typeof(Result))
+        {
+            return false;
+        }
+
+        return Equals((Result)other);
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterFromAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterToAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionTypeAttribute.g.verified.cs
similarity index 95%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class-exclude-True#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
similarity index 92%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#Result.g.verified.cs
similarity index 100%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#Result.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#Result.g.verified.cs
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs
similarity index 93%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs
similarity index 91%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterToAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-class#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs
similarity index 95%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionTypeAttribute.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..29d7087
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: GenericUnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class GenericUnionTypeAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object? TypeDiscriminator { get; set; }
+#else
+        public string Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object TypeDiscriminator { get; set; }
+#endif
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
new file mode 100644
index 0000000..52628cf
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -0,0 +1,24 @@
+//HintName: JsonPolymorphicUnionAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class JsonPolymorphicUnionAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? TypeDiscriminatorPropertyName { get; set; }
+#else
+        public string TypeDiscriminatorPropertyName { get; set; }
+#endif    
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#Result.g.verified.cs
new file mode 100644
index 0000000..5490be7
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#Result.g.verified.cs
@@ -0,0 +1,286 @@
+//HintName: Result.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#pragma warning disable
+#nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+partial struct Result : System.IEquatable<Result>
+{
+    private readonly int _variantId;
+    private const int SuccessId = 1;
+    private readonly global::Success _success;
+    public bool IsSuccess => _variantId == SuccessId;
+    public global::Success AsSuccess
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return _success;
+            throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {ValueAlias} not Success.");
+        }
+    }
+
+    public Result(global::Success success)
+    {
+        System.ArgumentNullException.ThrowIfNull(success);
+        _variantId = SuccessId;
+        _success = success;
+    }
+
+    public static implicit operator Result(global::Success success) => new Result(success);
+    public static explicit operator global::Success(Result value)
+    {
+        if (value._variantId == SuccessId)
+            return value._success;
+        throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {value.ValueAlias} not Success.");
+    }
+
+    public bool TryGetSuccess([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Success value)
+    {
+        if (_variantId == SuccessId)
+        {
+            value = _success;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int ErrorId = 2;
+    private readonly global::Error _error;
+    public bool IsError => _variantId == ErrorId;
+    public global::Error AsError
+    {
+        get
+        {
+            if (_variantId == ErrorId)
+                return _error;
+            throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {ValueAlias} not Error.");
+        }
+    }
+
+    public Result(global::Error @error)
+    {
+        System.ArgumentNullException.ThrowIfNull(@error);
+        _variantId = ErrorId;
+        _error = @error;
+    }
+
+    public static implicit operator Result(global::Error @error) => new Result(@error);
+    public static explicit operator global::Error(Result value)
+    {
+        if (value._variantId == ErrorId)
+            return value._error;
+        throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {value.ValueAlias} not Error.");
+    }
+
+    public bool TryGetError([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Error value)
+    {
+        if (_variantId == ErrorId)
+        {
+            value = _error;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int WrappedOfIReadOnlyListOfStringId = 3;
+    private readonly global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> _wrappedOfIReadOnlyListOfString;
+    public bool IsWrappedOfIReadOnlyListOfString => _variantId == WrappedOfIReadOnlyListOfStringId;
+    public global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> AsWrappedOfIReadOnlyListOfString
+    {
+        get
+        {
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return _wrappedOfIReadOnlyListOfString;
+            throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {ValueAlias} not WrappedOfIReadOnlyListOfString.");
+        }
+    }
+
+    public Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString)
+    {
+        System.ArgumentNullException.ThrowIfNull(wrappedOfIReadOnlyListOfString);
+        _variantId = WrappedOfIReadOnlyListOfStringId;
+        _wrappedOfIReadOnlyListOfString = wrappedOfIReadOnlyListOfString;
+    }
+
+    public static implicit operator Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString) => new Result(wrappedOfIReadOnlyListOfString);
+    public static explicit operator global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>(Result value)
+    {
+        if (value._variantId == WrappedOfIReadOnlyListOfStringId)
+            return value._wrappedOfIReadOnlyListOfString;
+        throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {value.ValueAlias} not WrappedOfIReadOnlyListOfString.");
+    }
+
+    public bool TryGetWrappedOfIReadOnlyListOfString([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> value)
+    {
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            value = _wrappedOfIReadOnlyListOfString;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    public TOut Match<TOut>(global::System.Func<global::Success, TOut> matchSuccess, global::System.Func<global::Error, TOut> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, TOut> matchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+            return matchSuccess(_success);
+        if (_variantId == ErrorId)
+            return matchError(_error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task<TOut> MatchAsync<TOut>(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+            return await matchSuccess(_success, ct).ConfigureAwait(false);
+        if (_variantId == ErrorId)
+            return await matchError(_error, ct).ConfigureAwait(false);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return await matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public void Switch(global::System.Action<global::Success> switchSuccess, global::System.Action<global::Error> switchError, global::System.Action<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>> switchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+        {
+            switchSuccess(_success);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            switchError(_error);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task SwitchAsync(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+        {
+            await switchSuccess(_success, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            await switchError(_error, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            await switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public global::System.Type ValueType
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return typeof(global::Success);
+            if (_variantId == ErrorId)
+                return typeof(global::Error);
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return typeof(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>);
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    private string ValueAlias
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return "Success";
+            if (_variantId == ErrorId)
+                return "Error";
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return "WrappedOfIReadOnlyListOfString";
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    public override int GetHashCode()
+    {
+        if (_variantId == SuccessId)
+            return _success.GetHashCode();
+        if (_variantId == ErrorId)
+            return _error.GetHashCode();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.GetHashCode();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public static bool operator ==(Result left, Result right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(Result left, Result right)
+    {
+        return !left.Equals(right);
+    }
+
+    public bool Equals(Result other)
+    {
+        if (ValueType != other.ValueType)
+        {
+            return false;
+        }
+
+        if (_variantId == SuccessId)
+            return System.Collections.Generic.EqualityComparer<global::Success>.Default.Equals(_success, other._success);
+        if (_variantId == ErrorId)
+            return System.Collections.Generic.EqualityComparer<global::Error>.Default.Equals(_error, other._error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return System.Collections.Generic.EqualityComparer<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>>.Default.Equals(_wrappedOfIReadOnlyListOfString, other._wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override string ToString()
+    {
+        if (_variantId == SuccessId)
+            return _success.ToString();
+        if (_variantId == ErrorId)
+            return _error.ToString();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.ToString();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override bool Equals(object? obj)
+    {
+        return obj is Result other && Equals(other);
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs
new file mode 100644
index 0000000..3a119c2
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs
@@ -0,0 +1,33 @@
+//HintName: UnionConverterAttribute.g.cs
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterAttribute : Attribute
+    {
+        public Type FromType { get; }
+        public Type ToType { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? MethodName { get; }
+#else
+        public string MethodName { get; }
+#endif        
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionConverterAttribute(Type fromType, Type toType, string? methodName = null)
+#else
+        public UnionConverterAttribute(Type fromType, Type toType, string methodName = null)
+#endif
+        {
+            FromType = fromType;
+            ToType = toType;
+            MethodName = methodName;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs
new file mode 100644
index 0000000..43174eb
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterFromAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterFromAttribute : Attribute
+    {
+        public Type FromType { get; }
+
+        public UnionConverterFromAttribute(Type fromType)
+        {
+            FromType = fromType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs
new file mode 100644
index 0000000..b72ef9e
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterToAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterToAttribute : Attribute
+    {
+        public Type ToType { get; }
+
+        public UnionConverterToAttribute(Type toType)
+        {
+            ToType = toType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..72e4fc5
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs
@@ -0,0 +1,43 @@
+//HintName: UnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class UnionTypeAttribute : Attribute
+    {
+        public Type Type { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; }
+#else
+        public string Alias { get; }
+#endif
+        public int Order { get; }
+        public bool AllowNull { get; set; }
+#if NETCOREAPP3_1_OR_GREATER
+        public object? TypeDiscriminator { get; set; }
+#else
+        public object TypeDiscriminator { get; set; }
+#endif
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionTypeAttribute(Type type, string? alias = null, [CallerLineNumber] int order = 0)
+#else
+        public UnionTypeAttribute(Type type, string alias = null, [CallerLineNumber] int order = 0)
+#endif
+        {
+            Type = type;
+            Alias = alias;
+            Order = order;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..29d7087
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#GenericUnionTypeAttribute.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: GenericUnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class GenericUnionTypeAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object? TypeDiscriminator { get; set; }
+#else
+        public string Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object TypeDiscriminator { get; set; }
+#endif
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
new file mode 100644
index 0000000..52628cf
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -0,0 +1,24 @@
+//HintName: JsonPolymorphicUnionAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class JsonPolymorphicUnionAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? TypeDiscriminatorPropertyName { get; set; }
+#else
+        public string TypeDiscriminatorPropertyName { get; set; }
+#endif    
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#Result.g.verified.cs
similarity index 100%
rename from tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct#Result.g.verified.cs
rename to tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#Result.g.verified.cs
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs
new file mode 100644
index 0000000..3a119c2
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterAttribute.g.verified.cs
@@ -0,0 +1,33 @@
+//HintName: UnionConverterAttribute.g.cs
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterAttribute : Attribute
+    {
+        public Type FromType { get; }
+        public Type ToType { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? MethodName { get; }
+#else
+        public string MethodName { get; }
+#endif        
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionConverterAttribute(Type fromType, Type toType, string? methodName = null)
+#else
+        public UnionConverterAttribute(Type fromType, Type toType, string methodName = null)
+#endif
+        {
+            FromType = fromType;
+            ToType = toType;
+            MethodName = methodName;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs
new file mode 100644
index 0000000..43174eb
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterFromAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterFromAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterFromAttribute : Attribute
+    {
+        public Type FromType { get; }
+
+        public UnionConverterFromAttribute(Type fromType)
+        {
+            FromType = fromType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs
new file mode 100644
index 0000000..b72ef9e
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionConverterToAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterToAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterToAttribute : Attribute
+    {
+        public Type ToType { get; }
+
+        public UnionConverterToAttribute(Type toType)
+        {
+            ToType = toType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..72e4fc5
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-False#UnionTypeAttribute.g.verified.cs
@@ -0,0 +1,43 @@
+//HintName: UnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class UnionTypeAttribute : Attribute
+    {
+        public Type Type { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; }
+#else
+        public string Alias { get; }
+#endif
+        public int Order { get; }
+        public bool AllowNull { get; set; }
+#if NETCOREAPP3_1_OR_GREATER
+        public object? TypeDiscriminator { get; set; }
+#else
+        public object TypeDiscriminator { get; set; }
+#endif
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionTypeAttribute(Type type, string? alias = null, [CallerLineNumber] int order = 0)
+#else
+        public UnionTypeAttribute(Type type, string alias = null, [CallerLineNumber] int order = 0)
+#endif
+        {
+            Type = type;
+            Alias = alias;
+            Order = order;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..29d7087
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#GenericUnionTypeAttribute.g.verified.cs
@@ -0,0 +1,28 @@
+//HintName: GenericUnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class GenericUnionTypeAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object? TypeDiscriminator { get; set; }
+#else
+        public string Alias { get; set; }
+        public bool AllowNull { get; set; }
+        public object TypeDiscriminator { get; set; }
+#endif
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
new file mode 100644
index 0000000..52628cf
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -0,0 +1,24 @@
+//HintName: JsonPolymorphicUnionAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class JsonPolymorphicUnionAttribute : Attribute
+    {
+#if NETCOREAPP3_1_OR_GREATER
+        public string? TypeDiscriminatorPropertyName { get; set; }
+#else
+        public string TypeDiscriminatorPropertyName { get; set; }
+#endif    
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#Result.g.verified.cs
new file mode 100644
index 0000000..5490be7
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#Result.g.verified.cs
@@ -0,0 +1,286 @@
+//HintName: Result.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#pragma warning disable
+#nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+partial struct Result : System.IEquatable<Result>
+{
+    private readonly int _variantId;
+    private const int SuccessId = 1;
+    private readonly global::Success _success;
+    public bool IsSuccess => _variantId == SuccessId;
+    public global::Success AsSuccess
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return _success;
+            throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {ValueAlias} not Success.");
+        }
+    }
+
+    public Result(global::Success success)
+    {
+        System.ArgumentNullException.ThrowIfNull(success);
+        _variantId = SuccessId;
+        _success = success;
+    }
+
+    public static implicit operator Result(global::Success success) => new Result(success);
+    public static explicit operator global::Success(Result value)
+    {
+        if (value._variantId == SuccessId)
+            return value._success;
+        throw new System.InvalidOperationException($"Unable convert to Success. Inner value is {value.ValueAlias} not Success.");
+    }
+
+    public bool TryGetSuccess([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Success value)
+    {
+        if (_variantId == SuccessId)
+        {
+            value = _success;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int ErrorId = 2;
+    private readonly global::Error _error;
+    public bool IsError => _variantId == ErrorId;
+    public global::Error AsError
+    {
+        get
+        {
+            if (_variantId == ErrorId)
+                return _error;
+            throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {ValueAlias} not Error.");
+        }
+    }
+
+    public Result(global::Error @error)
+    {
+        System.ArgumentNullException.ThrowIfNull(@error);
+        _variantId = ErrorId;
+        _error = @error;
+    }
+
+    public static implicit operator Result(global::Error @error) => new Result(@error);
+    public static explicit operator global::Error(Result value)
+    {
+        if (value._variantId == ErrorId)
+            return value._error;
+        throw new System.InvalidOperationException($"Unable convert to Error. Inner value is {value.ValueAlias} not Error.");
+    }
+
+    public bool TryGetError([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Error value)
+    {
+        if (_variantId == ErrorId)
+        {
+            value = _error;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    private const int WrappedOfIReadOnlyListOfStringId = 3;
+    private readonly global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> _wrappedOfIReadOnlyListOfString;
+    public bool IsWrappedOfIReadOnlyListOfString => _variantId == WrappedOfIReadOnlyListOfStringId;
+    public global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> AsWrappedOfIReadOnlyListOfString
+    {
+        get
+        {
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return _wrappedOfIReadOnlyListOfString;
+            throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {ValueAlias} not WrappedOfIReadOnlyListOfString.");
+        }
+    }
+
+    public Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString)
+    {
+        System.ArgumentNullException.ThrowIfNull(wrappedOfIReadOnlyListOfString);
+        _variantId = WrappedOfIReadOnlyListOfStringId;
+        _wrappedOfIReadOnlyListOfString = wrappedOfIReadOnlyListOfString;
+    }
+
+    public static implicit operator Result(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> wrappedOfIReadOnlyListOfString) => new Result(wrappedOfIReadOnlyListOfString);
+    public static explicit operator global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>(Result value)
+    {
+        if (value._variantId == WrappedOfIReadOnlyListOfStringId)
+            return value._wrappedOfIReadOnlyListOfString;
+        throw new System.InvalidOperationException($"Unable convert to WrappedOfIReadOnlyListOfString. Inner value is {value.ValueAlias} not WrappedOfIReadOnlyListOfString.");
+    }
+
+    public bool TryGetWrappedOfIReadOnlyListOfString([System.Diagnostics.CodeAnalysis.NotNullWhen(true)] out global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>> value)
+    {
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            value = _wrappedOfIReadOnlyListOfString;
+            return true;
+        }
+        else
+        {
+            value = default;
+            return false;
+        }
+    }
+
+    public TOut Match<TOut>(global::System.Func<global::Success, TOut> matchSuccess, global::System.Func<global::Error, TOut> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, TOut> matchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+            return matchSuccess(_success);
+        if (_variantId == ErrorId)
+            return matchError(_error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task<TOut> MatchAsync<TOut>(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<TOut>> matchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+            return await matchSuccess(_success, ct).ConfigureAwait(false);
+        if (_variantId == ErrorId)
+            return await matchError(_error, ct).ConfigureAwait(false);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return await matchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public void Switch(global::System.Action<global::Success> switchSuccess, global::System.Action<global::Error> switchError, global::System.Action<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>> switchWrappedOfIReadOnlyListOfString)
+    {
+        if (_variantId == SuccessId)
+        {
+            switchSuccess(_success);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            switchError(_error);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public async global::System.Threading.Tasks.Task SwitchAsync(global::System.Func<global::Success, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchSuccess, global::System.Func<global::Error, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchError, global::System.Func<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task> switchWrappedOfIReadOnlyListOfString, global::System.Threading.CancellationToken ct)
+    {
+        if (_variantId == SuccessId)
+        {
+            await switchSuccess(_success, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == ErrorId)
+        {
+            await switchError(_error, ct).ConfigureAwait(false);
+            return;
+        }
+
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+        {
+            await switchWrappedOfIReadOnlyListOfString(_wrappedOfIReadOnlyListOfString, ct).ConfigureAwait(false);
+            return;
+        }
+
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public global::System.Type ValueType
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return typeof(global::Success);
+            if (_variantId == ErrorId)
+                return typeof(global::Error);
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return typeof(global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>);
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    private string ValueAlias
+    {
+        get
+        {
+            if (_variantId == SuccessId)
+                return "Success";
+            if (_variantId == ErrorId)
+                return "Error";
+            if (_variantId == WrappedOfIReadOnlyListOfStringId)
+                return "WrappedOfIReadOnlyListOfString";
+            throw new System.InvalidOperationException("Inner type is unknown");
+        }
+    }
+
+    public override int GetHashCode()
+    {
+        if (_variantId == SuccessId)
+            return _success.GetHashCode();
+        if (_variantId == ErrorId)
+            return _error.GetHashCode();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.GetHashCode();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public static bool operator ==(Result left, Result right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(Result left, Result right)
+    {
+        return !left.Equals(right);
+    }
+
+    public bool Equals(Result other)
+    {
+        if (ValueType != other.ValueType)
+        {
+            return false;
+        }
+
+        if (_variantId == SuccessId)
+            return System.Collections.Generic.EqualityComparer<global::Success>.Default.Equals(_success, other._success);
+        if (_variantId == ErrorId)
+            return System.Collections.Generic.EqualityComparer<global::Error>.Default.Equals(_error, other._error);
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return System.Collections.Generic.EqualityComparer<global::Wrapped<global::System.Collections.Generic.IReadOnlyList<string>>>.Default.Equals(_wrappedOfIReadOnlyListOfString, other._wrappedOfIReadOnlyListOfString);
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override string ToString()
+    {
+        if (_variantId == SuccessId)
+            return _success.ToString();
+        if (_variantId == ErrorId)
+            return _error.ToString();
+        if (_variantId == WrappedOfIReadOnlyListOfStringId)
+            return _wrappedOfIReadOnlyListOfString.ToString();
+        throw new System.InvalidOperationException("Inner type is unknown");
+    }
+
+    public override bool Equals(object? obj)
+    {
+        return obj is Result other && Equals(other);
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs
new file mode 100644
index 0000000..3a119c2
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterAttribute.g.verified.cs
@@ -0,0 +1,33 @@
+//HintName: UnionConverterAttribute.g.cs
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterAttribute : Attribute
+    {
+        public Type FromType { get; }
+        public Type ToType { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? MethodName { get; }
+#else
+        public string MethodName { get; }
+#endif        
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionConverterAttribute(Type fromType, Type toType, string? methodName = null)
+#else
+        public UnionConverterAttribute(Type fromType, Type toType, string methodName = null)
+#endif
+        {
+            FromType = fromType;
+            ToType = toType;
+            MethodName = methodName;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs
new file mode 100644
index 0000000..43174eb
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterFromAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterFromAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterFromAttribute : Attribute
+    {
+        public Type FromType { get; }
+
+        public UnionConverterFromAttribute(Type fromType)
+        {
+            FromType = fromType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs
new file mode 100644
index 0000000..b72ef9e
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionConverterToAttribute.g.verified.cs
@@ -0,0 +1,25 @@
+//HintName: UnionConverterToAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    sealed class UnionConverterToAttribute : Attribute
+    {
+        public Type ToType { get; }
+
+        public UnionConverterToAttribute(Type toType)
+        {
+            ToType = toType;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs
new file mode 100644
index 0000000..72e4fc5
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GeneratorTests.WithoutNamespace_readonly-partial-struct-exclude-True#UnionTypeAttribute.g.verified.cs
@@ -0,0 +1,43 @@
+//HintName: UnionTypeAttribute.g.cs
+// <auto-generated>
+//   This code was generated by https://github.com/Ne4to/N.SourceGenerators.UnionTypes
+//   Feel free to open an issue
+// </auto-generated>
+#if NETCOREAPP3_1_OR_GREATER
+#nullable enable
+#endif
+using System;
+using System.Runtime.CompilerServices;
+
+namespace N.SourceGenerators.UnionTypes
+{
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
+    internal sealed class UnionTypeAttribute : Attribute
+    {
+        public Type Type { get; }
+#if NETCOREAPP3_1_OR_GREATER
+        public string? Alias { get; }
+#else
+        public string Alias { get; }
+#endif
+        public int Order { get; }
+        public bool AllowNull { get; set; }
+#if NETCOREAPP3_1_OR_GREATER
+        public object? TypeDiscriminator { get; set; }
+#else
+        public object TypeDiscriminator { get; set; }
+#endif
+
+#if NETCOREAPP3_1_OR_GREATER
+        public UnionTypeAttribute(Type type, string? alias = null, [CallerLineNumber] int order = 0)
+#else
+        public UnionTypeAttribute(Type type, string alias = null, [CallerLineNumber] int order = 0)
+#endif
+        {
+            Type = type;
+            Alias = alias;
+            Order = order;
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#OperationDataResultOfTAndTError.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#OperationDataResultOfTAndTError.g.verified.cs
index f31b42e..4eb6de9 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#OperationDataResultOfTAndTError.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#OperationDataResultOfTAndTError.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 partial class OperationDataResult<T, TError> : System.IEquatable<OperationDataResult<T, TError>>
 {
     private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.OnlyGenericTypes#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericResultNullableOfT.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericResultNullableOfT.g.verified.cs
index 570b180..c597238 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericResultNullableOfT.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericResultNullableOfT.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 partial class GenericResultNullable<T> : System.IEquatable<GenericResultNullable<T>>
 {
     private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithAlias#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#OperationDataResultOfTResultAndTError.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#OperationDataResultOfTResultAndTError.g.verified.cs
index bbcaf10..0c7ebc4 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#OperationDataResultOfTResultAndTError.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#OperationDataResultOfTResultAndTError.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 partial class OperationDataResult<TResult, TError> : System.IEquatable<OperationDataResult<TResult, TError>>
 {
     private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/GenericUnionTests.WithCustomUnionType#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnion.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnion.g.verified.cs
index 7dc2348..f9f49fd 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnion.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnion.g.verified.cs
@@ -6,6 +6,7 @@
 #pragma warning disable
 #nullable enable
 [JsonTestsUnionJsonConverter]
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 partial class JsonTestsUnion : System.IEquatable<JsonTestsUnion>
 {
     private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverter.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverter.g.verified.cs
index 7673c93..37876f3 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverter.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverter.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 internal class JsonTestsUnionJsonConverter : System.Text.Json.Serialization.JsonConverter<JsonTestsUnion>
 {
     private static object? GetDiscriminator(object x)
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverterAttribute.g.verified.cs
index 357e311..c815992 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#JsonTestsUnionJsonConverterAttribute.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 internal class JsonTestsUnionJsonConverterAttribute : System.Text.Json.Serialization.JsonConverterAttribute
 {
     public override System.Text.Json.Serialization.JsonConverter? CreateConverter(System.Type typeToConvert)
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/JsonTests.ItDoesNotFail#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#Result.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#Result.g.verified.cs
index 34fb582..87c954c 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#Result.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#Result.g.verified.cs
@@ -5,6 +5,7 @@
 // </auto-generated>
 #pragma warning disable
 #nullable enable
+[System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
 partial class Result : System.IEquatable<Result>
 {
     private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/NullableValueTests.UseAllowNullAttribute#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#DataAccessModel.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#DataAccessModel.g.verified.cs
index 1121e86..0950459 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#DataAccessModel.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#DataAccessModel.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace DataAccess
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class DataAccessModel : System.IEquatable<DataAccessModel>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_0#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#BusinessLogicModel.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#BusinessLogicModel.g.verified.cs
index cf9b9be..07e20de 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#BusinessLogicModel.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#BusinessLogicModel.g.verified.cs
@@ -7,6 +7,7 @@
 #nullable enable
 namespace BusinessLogic
 {
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     partial class BusinessLogicModel : System.IEquatable<BusinessLogicModel>
     {
         private readonly int _variantId;
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#GenericUnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#GenericUnionTypeAttribute.g.verified.cs
index 17a28f9..29d7087 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#GenericUnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#GenericUnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.GenericParameter, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class GenericUnionTypeAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#JsonPolymorphicUnionAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#JsonPolymorphicUnionAttribute.g.verified.cs
index ee781ad..52628cf 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#JsonPolymorphicUnionAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#JsonPolymorphicUnionAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = false)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class JsonPolymorphicUnionAttribute : Attribute
     {
 #if NETCOREAPP3_1_OR_GREATER
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterAttribute.g.verified.cs
index 973b6e2..3a119c2 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterAttribute.g.verified.cs
@@ -8,6 +8,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterFromAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterFromAttribute.g.verified.cs
index 222e936..43174eb 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterFromAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterFromAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterFromAttribute : Attribute
     {
         public Type FromType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterToAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterToAttribute.g.verified.cs
index 28901ff..b72ef9e 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterToAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionConverterToAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     sealed class UnionConverterToAttribute : Attribute
     {
         public Type ToType { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionTypeAttribute.g.verified.cs b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionTypeAttribute.g.verified.cs
index 927bc14..72e4fc5 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionTypeAttribute.g.verified.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/Snapshots/TwoAssemblyTests.UnionConverterFromInOtherAssembly_1#UnionTypeAttribute.g.verified.cs
@@ -12,6 +12,7 @@
 namespace N.SourceGenerators.UnionTypes
 {
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct, Inherited = false, AllowMultiple = true)]
+    [System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
     internal sealed class UnionTypeAttribute : Attribute
     {
         public Type Type { get; }
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/TestHelper.cs b/tests/N.SourceGenerators.UnionTypes.Tests/TestHelper.cs
index 83cd2eb..9ad201c 100644
--- a/tests/N.SourceGenerators.UnionTypes.Tests/TestHelper.cs
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/TestHelper.cs
@@ -13,13 +13,15 @@ public static Task Verify<TGenerator>(
         string source,
         LanguageVersion languageVersion = LanguageVersion.Latest,
         string? parametersText = null,
+        UnionTypesAnalyzerConfigOptions? analyzerOptions = null,
         params PortableExecutableReference[] additionalReferences)
         where TGenerator : IIncrementalGenerator, new()
     {
         return Verify<TGenerator>(
-            [source], 
-            languageVersion, 
+            [source],
+            languageVersion,
             parametersText,
+            analyzerOptions,
             additionalReferences);
     }
 
@@ -27,6 +29,7 @@ public static async Task Verify<TGenerator>(
         string[] sources,
         LanguageVersion languageVersion = LanguageVersion.Latest,
         string? parametersText = null,
+        UnionTypesAnalyzerConfigOptions? analyzerOptions = null,
         params PortableExecutableReference[] additionalReferences)
         where TGenerator : IIncrementalGenerator, new()
     {
@@ -40,23 +43,20 @@ public static async Task Verify<TGenerator>(
             SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(source, options);
             // Create references for assemblies we require
             // We could add multiple references if required
-            var references = new List<PortableExecutableReference>
-            {
-                MetadataReference.CreateFromFile(typeof(object).Assembly.Location)
-            };
-            
+            var references = new List<PortableExecutableReference> { MetadataReference.CreateFromFile(typeof(object).Assembly.Location) };
+
             references.AddRange(additionalReferences);
 
             // /usr/local/share/dotnet/shared/Microsoft.NETCore.App/7.0.11/System.Text.Json.dll
             // Create a Roslyn compilation for the syntax tree.
             CSharpCompilationOptions compilationOptions = new(OutputKind.DynamicallyLinkedLibrary);
-            
+
             CSharpCompilation compilation = CSharpCompilation.Create(
                 assemblyName: $"Tests{sourceIndex}",
                 syntaxTrees: new[] { syntaxTree },
                 references,
                 compilationOptions);
-            
+
             if (previousCompilation != null)
             {
                 compilation = compilation.AddReferences(previousCompilation.ToMetadataReference());
@@ -66,7 +66,10 @@ public static async Task Verify<TGenerator>(
             var generator = new TGenerator();
 
             // The GeneratorDriver is used to run our generator against a compilation
-            GeneratorDriver driver = CSharpGeneratorDriver.Create(parseOptions: options, generators: [generator.AsSourceGenerator()]);
+            GeneratorDriver driver = CSharpGeneratorDriver.Create(
+                parseOptions: options,
+                generators: [generator.AsSourceGenerator()],
+                optionsProvider: new GeneratorAnalyzerConfigOptionsProvider(analyzerOptions));
 
             // Run the source generator!
             driver = driver.RunGeneratorsAndUpdateCompilation(compilation, out var outputCompilation,
diff --git a/tests/N.SourceGenerators.UnionTypes.Tests/UnionTypesAnalyzerConfigOptions.cs b/tests/N.SourceGenerators.UnionTypes.Tests/UnionTypesAnalyzerConfigOptions.cs
new file mode 100644
index 0000000..06a38b2
--- /dev/null
+++ b/tests/N.SourceGenerators.UnionTypes.Tests/UnionTypesAnalyzerConfigOptions.cs
@@ -0,0 +1,23 @@
+using System.Diagnostics.CodeAnalysis;
+
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace N.SourceGenerators.UnionTypes.Tests;
+
+public class UnionTypesAnalyzerConfigOptions : AnalyzerConfigOptions
+{
+    private readonly Dictionary<string, string> _options = new();
+
+    public static UnionTypesAnalyzerConfigOptions Default { get; } = new();
+
+    public bool ExcludeFromCodeCoverage
+    {
+        get => _options.GetValueOrDefault(UnionTypesGenerator.ExcludeFromCodeCoverageOption) == "true";
+        set => _options[UnionTypesGenerator.ExcludeFromCodeCoverageOption] = value.ToString();
+    }
+
+    public override bool TryGetValue(string key, [UnscopedRef] out string? value)
+    {
+        return _options.TryGetValue(key, out value);
+    }
+}
\ No newline at end of file