diff --git a/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/Fixture/a_new_class.php.inc b/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/Fixture/a_new_class.php.inc
new file mode 100644
index 00000000000..6027d356534
--- /dev/null
+++ b/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/Fixture/a_new_class.php.inc
@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\TypeDeclaration\Tests\Rector\ClassMethod\ReturnTypeDeclarationRector\Fixture;
+
+class ANewClass
+{
+    public function getObject()
+    {
+        return new class() {};
+    }
+}
diff --git a/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/ReturnTypeDeclarationRectorTest.php b/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/ReturnTypeDeclarationRectorTest.php
index 8ac2a1b6111..779b43d4a7a 100644
--- a/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/ReturnTypeDeclarationRectorTest.php
+++ b/packages/TypeDeclaration/tests/Rector/FunctionLike/ReturnTypeDeclarationRector/ReturnTypeDeclarationRectorTest.php
@@ -53,6 +53,8 @@ final class ReturnTypeDeclarationRectorTest extends AbstractRectorTestCase
             __DIR__ . '/Fixture/dunglas/BazTrait.php.inc',
             __DIR__ . '/Fixture/dunglas/Child.php.inc',
             __DIR__ . '/Fixture/dunglas/nullable_types.php.inc',
+            // anonymous class
+            __DIR__ . '/Fixture/a_new_class.php.inc',
         ];
 
         $this->doTestFiles($integrationFiles);