diff --git a/test/index.test.js b/test/index.test.js
index 7595f086..3a6d211b 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -160,6 +160,24 @@ test('should prepend data', async () => {
   expect(css).toEqual('.background {\n  color: red;\n}\n');
 });
 
+test('should prepend data', async () => {
+  const loaderOptions = {
+    prependData: `@background: red;`,
+  };
+
+  let inspect;
+
+  const rules = moduleRules.basic(loaderOptions, {}, (i) => {
+    inspect = i;
+  });
+
+  await compile('prepend-data', rules).catch((e) => e);
+
+  const [css] = inspect.arguments;
+
+  expect(css).toEqual('.background {\n  color: red;\n}\n');
+});
+
 test('should append data', async () => {
   const loaderOptions = {
     appendData() {
@@ -180,6 +198,24 @@ test('should append data', async () => {
   expect(css).toEqual('.background {\n  color: coral;\n}\n');
 });
 
+test('should append data', async () => {
+  const loaderOptions = {
+    appendData: `@color1: coral;`,
+  };
+
+  let inspect;
+
+  const rules = moduleRules.basic(loaderOptions, {}, (i) => {
+    inspect = i;
+  });
+
+  await compile('append-data', rules).catch((e) => e);
+
+  const [css] = inspect.arguments;
+
+  expect(css).toEqual('.background {\n  color: coral;\n}\n');
+});
+
 test('should allow a function to be passed through for `lessOptions`', async () => {
   await compileAndCompare('import-paths', {
     lessLoaderOptions: {