diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 44cf657..2456d21 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\Auditor\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Auditor';
 
diff --git a/tests/Controller/ApiControllerTest.php b/tests/Controller/ApiControllerTest.php
index fc8395f..897e70b 100755
--- a/tests/Controller/ApiControllerTest.php
+++ b/tests/Controller/ApiControllerTest.php
@@ -33,7 +33,7 @@ use phpOMS\Utils\TestUtils;
  *
  * @internal
  */
-class ApiControllerTest extends \PHPUnit\Framework\TestCase
+final class ApiControllerTest extends \PHPUnit\Framework\TestCase
 {
     protected ApplicationAbstract $app;
 
diff --git a/tests/Models/AuditMapperTest.php b/tests/Models/AuditMapperTest.php
index 943a682..9ca5914 100755
--- a/tests/Models/AuditMapperTest.php
+++ b/tests/Models/AuditMapperTest.php
@@ -19,7 +19,7 @@ use Modules\Auditor\Models\AuditMapper;
 /**
  * @internal
  */
-class AuditMapperTest extends \PHPUnit\Framework\TestCase
+final class AuditMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\Auditor\Models\AuditMapper
diff --git a/tests/Models/AuditTest.php b/tests/Models/AuditTest.php
index f903dfe..2e39502 100755
--- a/tests/Models/AuditTest.php
+++ b/tests/Models/AuditTest.php
@@ -22,7 +22,7 @@ use phpOMS\Account\Account;
  *
  * @internal
  */
-class AuditTest extends \PHPUnit\Framework\TestCase
+final class AuditTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model has the expected default values after initialization