diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index be24043..ddbdbcf 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\QA\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'QA';
 
diff --git a/tests/Models/3QAQuestionMapperTest.php b/tests/Models/3QAQuestionMapperTest.php
index 566fb7d..c5f5aa6 100755
--- a/tests/Models/3QAQuestionMapperTest.php
+++ b/tests/Models/3QAQuestionMapperTest.php
@@ -24,7 +24,7 @@ use phpOMS\Utils\RnG\Text;
 /**
  * @internal
  */
-class QAQuestionMapperTest extends \PHPUnit\Framework\TestCase
+final class QAQuestionMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\QA\Models\QAQuestionMapper
diff --git a/tests/Models/4QAAnswerMapperTest.php b/tests/Models/4QAAnswerMapperTest.php
index 5f5e435..8557a2b 100755
--- a/tests/Models/4QAAnswerMapperTest.php
+++ b/tests/Models/4QAAnswerMapperTest.php
@@ -25,7 +25,7 @@ use phpOMS\Utils\RnG\Text;
 /**
  * @internal
  */
-class QAAnswerMapperTest extends \PHPUnit\Framework\TestCase
+final class QAAnswerMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\QA\Models\QAAnswerMapper
diff --git a/tests/Models/QAAnswerTest.php b/tests/Models/QAAnswerTest.php
index e45d037..5ae28c7 100755
--- a/tests/Models/QAAnswerTest.php
+++ b/tests/Models/QAAnswerTest.php
@@ -22,7 +22,7 @@ use Modules\QA\Models\QAAnswerStatus;
 /**
  * @internal
  */
-class QAAnswerTest extends \PHPUnit\Framework\TestCase
+final class QAAnswerTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\QA\Models\QAAnswer
diff --git a/tests/Models/QAQuestionTest.php b/tests/Models/QAQuestionTest.php
index ec0d85c..aebe778 100755
--- a/tests/Models/QAQuestionTest.php
+++ b/tests/Models/QAQuestionTest.php
@@ -21,7 +21,7 @@ use Modules\QA\Models\QAQuestionStatus;
 /**
  * @internal
  */
-class QAQuestionTest extends \PHPUnit\Framework\TestCase
+final class QAQuestionTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\QA\Models\QAQuestion