diff --git a/packages/Testing/PHPUnit/AbstractRectorTestCase.php b/packages/Testing/PHPUnit/AbstractRectorTestCase.php
index c9a5a106dd5..d08b6351018 100644
--- a/packages/Testing/PHPUnit/AbstractRectorTestCase.php
+++ b/packages/Testing/PHPUnit/AbstractRectorTestCase.php
@@ -163,4 +163,16 @@ private function processFileInfo(SmartFileInfo $fileInfo): string
 
         return $file->getFileContent();
     }
+
+    protected function tearDown(): void
+    {
+        unset(
+            $this->applicationFileProcessor,
+            $this->parameterProvider,
+            $this->dynamicSourceLocatorProvider,
+            $this->removedAndAddedFilesCollector,
+            $this->originalTempFileInfo,
+        );
+        gc_collect_cycles();
+    }
 }
diff --git a/rules-tests/TypeDeclaration/TypeNormalizerTest.php b/rules-tests/TypeDeclaration/TypeNormalizerTest.php
index a56d7f42708..60d6a6a6503 100644
--- a/rules-tests/TypeDeclaration/TypeNormalizerTest.php
+++ b/rules-tests/TypeDeclaration/TypeNormalizerTest.php
@@ -48,4 +48,9 @@ public function provideDataNormalizeArrayOfUnionToUnionArray(): Iterator
         $evenMoreNestedArrayType = new ArrayType(new MixedType(), $moreNestedArrayType);
         yield [$evenMoreNestedArrayType, 'int[][][]|string[][][]'];
     }
+
+    protected function tearDown(): void
+    {
+        unset($this->typeNormalizer);
+    }
 }