diff --git a/lib/datadog/opentelemetry/sdk/span_processor.rb b/lib/datadog/opentelemetry/sdk/span_processor.rb
index f4c09b6f9fc..caa07e91930 100644
--- a/lib/datadog/opentelemetry/sdk/span_processor.rb
+++ b/lib/datadog/opentelemetry/sdk/span_processor.rb
@@ -136,7 +136,7 @@ def span_arguments(span, attributes)
           end
           attributes.flatten!(1)
 
-          kwargs[:tags] = attributes
+          kwargs[:tags] = attributes.to_h
 
           [name, kwargs]
         end
diff --git a/spec/datadog/opentelemetry_spec.rb b/spec/datadog/opentelemetry_spec.rb
index 54ced07cf46..bdc24bd455b 100644
--- a/spec/datadog/opentelemetry_spec.rb
+++ b/spec/datadog/opentelemetry_spec.rb
@@ -45,9 +45,11 @@
 
     describe '#in_span' do
       context 'without an active span' do
-        subject!(:in_span) { otel_tracer.in_span('test', **span_options) {} }
+        subject(:in_span) { otel_tracer.in_span('test', **span_options) {} }
 
         it 'records a finished span' do
+          in_span
+
           expect(span).to be_root_span
           expect(span.name).to eq('internal')
           expect(span.resource).to eq('test')
@@ -57,6 +59,14 @@
         context 'with attributes' do
           let(:span_options) { { attributes: attributes } }
 
+          before do
+            Datadog.configure do |c|
+              c.tags = { 'global' => 'global_tag' }
+            end
+
+            in_span
+          end
+
           [
             [1, 1],
             [false, 'false'],
@@ -69,6 +79,10 @@
               it "sets tag #{expected}" do
                 expect(span.get_tag('tag')).to eq(expected)
               end
+
+              it 'keeps the global trace tags' do
+                expect(span.get_tag('global')).to eq('global_tag')
+              end
             end
           end
 
@@ -208,6 +222,7 @@
           let(:span_options) { { start_timestamp: start_timestamp } }
           let(:start_timestamp) { Time.utc(2023) }
           it do
+            in_span
             expect(span.start_time).to eq(start_timestamp)
           end
         end