diff --git a/Tests/Functional/Domain/Repository/Product/TeaRepositoryTest.php b/Tests/Functional/Domain/Repository/Product/TeaRepositoryTest.php
index 49fd285..78d16ba 100644
--- a/Tests/Functional/Domain/Repository/Product/TeaRepositoryTest.php
+++ b/Tests/Functional/Domain/Repository/Product/TeaRepositoryTest.php
@@ -15,7 +15,7 @@ use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
  * @covers \TTN\Tea\Domain\Repository\Product\TeaRepository
  * @covers \TTN\Tea\Domain\Model\Product\Tea
  */
-class TeaRepositoryTest extends FunctionalTestCase
+final class TeaRepositoryTest extends FunctionalTestCase
 {
     protected array $testExtensionsToLoad = ['typo3conf/ext/tea'];
 
diff --git a/Tests/Unit/Controller/TeaControllerTest.php b/Tests/Unit/Controller/TeaControllerTest.php
index a0960da..812f172 100644
--- a/Tests/Unit/Controller/TeaControllerTest.php
+++ b/Tests/Unit/Controller/TeaControllerTest.php
@@ -19,7 +19,7 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
 /**
  * @covers \TTN\Tea\Controller\TeaController
  */
-class TeaControllerTest extends UnitTestCase
+final class TeaControllerTest extends UnitTestCase
 {
     /**
      * @var TeaController&MockObject&AccessibleObjectInterface
diff --git a/Tests/Unit/Domain/Model/Product/TeaTest.php b/Tests/Unit/Domain/Model/Product/TeaTest.php
index 5bdc812..1a10f64 100644
--- a/Tests/Unit/Domain/Model/Product/TeaTest.php
+++ b/Tests/Unit/Domain/Model/Product/TeaTest.php
@@ -12,7 +12,7 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
 /**
  * @covers \TTN\Tea\Domain\Model\Product\Tea
  */
-class TeaTest extends UnitTestCase
+final class TeaTest extends UnitTestCase
 {
     private Tea $subject;
 
diff --git a/Tests/Unit/Domain/Repository/Product/TeaRepositoryTest.php b/Tests/Unit/Domain/Repository/Product/TeaRepositoryTest.php
index 22cadbf..f525fda 100644
--- a/Tests/Unit/Domain/Repository/Product/TeaRepositoryTest.php
+++ b/Tests/Unit/Domain/Repository/Product/TeaRepositoryTest.php
@@ -12,7 +12,7 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
 /**
  * @covers \TTN\Tea\Domain\Repository\Product\TeaRepository
  */
-class TeaRepositoryTest extends UnitTestCase
+final class TeaRepositoryTest extends UnitTestCase
 {
     private TeaRepository $subject;