diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index a8f0ffd..bc2ce8a 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\Admin\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Admin';
 
diff --git a/tests/Controller/ApiControllerTest.php b/tests/Controller/ApiControllerTest.php
index 8f0766d..34d97df 100755
--- a/tests/Controller/ApiControllerTest.php
+++ b/tests/Controller/ApiControllerTest.php
@@ -39,7 +39,7 @@ 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/AccountMapperTest.php b/tests/Models/AccountMapperTest.php
index 09b22bb..4c704e4 100755
--- a/tests/Models/AccountMapperTest.php
+++ b/tests/Models/AccountMapperTest.php
@@ -26,7 +26,7 @@ use phpOMS\Utils\TestUtils;
  *
  * @internal
  */
-class AccountMapperTest extends \PHPUnit\Framework\TestCase
+final class AccountMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/AccountPermissionTest.php b/tests/Models/AccountPermissionTest.php
index 7e4489f..2c4b3b8 100755
--- a/tests/Models/AccountPermissionTest.php
+++ b/tests/Models/AccountPermissionTest.php
@@ -21,7 +21,7 @@ use Modules\Admin\Models\AccountPermission;
  *
  * @internal
  */
-class AccountPermissionTest extends \PHPUnit\Framework\TestCase
+final class AccountPermissionTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The account permission has the expected default values after initialization
diff --git a/tests/Models/AccountTest.php b/tests/Models/AccountTest.php
index e6312ab..5241976 100755
--- a/tests/Models/AccountTest.php
+++ b/tests/Models/AccountTest.php
@@ -21,7 +21,7 @@ use Modules\Admin\Models\Account;
  *
  * @internal
  */
-class AccountTest extends \PHPUnit\Framework\TestCase
+final class AccountTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The account has the expected default values after initialization
diff --git a/tests/Models/AddressMapperTest.php b/tests/Models/AddressMapperTest.php
index 150073a..badf0fb 100644
--- a/tests/Models/AddressMapperTest.php
+++ b/tests/Models/AddressMapperTest.php
@@ -24,7 +24,7 @@ use phpOMS\Stdlib\Base\AddressType;
  *
  * @internal
  */
-class AddressMapperTest extends \PHPUnit\Framework\TestCase
+final class AddressMapperTest extends \PHPUnit\Framework\TestCase
 {
 	/**
      * @covers Modules\Admin\Models\AddressMapper
diff --git a/tests/Models/AddressTest.php b/tests/Models/AddressTest.php
index 21b6666..348a804 100644
--- a/tests/Models/AddressTest.php
+++ b/tests/Models/AddressTest.php
@@ -22,7 +22,7 @@ use phpOMS\Stdlib\Base\AddressType;
  *
  * @internal
  */
-class AddressTest extends \PHPUnit\Framework\TestCase
+final class AddressTest extends \PHPUnit\Framework\TestCase
 {
     protected Address $address;
 
diff --git a/tests/Models/AppMapperTest.php b/tests/Models/AppMapperTest.php
index 2c053b3..8688f18 100644
--- a/tests/Models/AppMapperTest.php
+++ b/tests/Models/AppMapperTest.php
@@ -24,7 +24,7 @@ use phpOMS\Utils\TestUtils;
  *
  * @internal
  */
-class AppMapperTest extends \PHPUnit\Framework\TestCase
+final class AppMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/AppTest.php b/tests/Models/AppTest.php
index 43eca0a..b1c05ad 100644
--- a/tests/Models/AppTest.php
+++ b/tests/Models/AppTest.php
@@ -21,7 +21,7 @@ use Modules\Admin\Models\App;
  *
  * @internal
  */
-class AppTest extends \PHPUnit\Framework\TestCase
+final class AppTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The account has the expected default values after initialization
diff --git a/tests/Models/GroupMapperTest.php b/tests/Models/GroupMapperTest.php
index b6b6e60..7563e9b 100755
--- a/tests/Models/GroupMapperTest.php
+++ b/tests/Models/GroupMapperTest.php
@@ -24,7 +24,7 @@ use Modules\Admin\Models\GroupPermissionMapper;
  *
  * @internal
  */
-class GroupMapperTest extends \PHPUnit\Framework\TestCase
+final class GroupMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox All groups which have permissions for a module can be returned
diff --git a/tests/Models/GroupPermissionTest.php b/tests/Models/GroupPermissionTest.php
index 95df64c..6ac379f 100755
--- a/tests/Models/GroupPermissionTest.php
+++ b/tests/Models/GroupPermissionTest.php
@@ -21,7 +21,7 @@ use Modules\Admin\Models\GroupPermission;
  *
  * @internal
  */
-class GroupPermissionTest extends \PHPUnit\Framework\TestCase
+final class GroupPermissionTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The group permission has the expected default values after initialization
diff --git a/tests/Models/GroupTest.php b/tests/Models/GroupTest.php
index dbf363e..622e7e7 100755
--- a/tests/Models/GroupTest.php
+++ b/tests/Models/GroupTest.php
@@ -22,7 +22,7 @@ use Modules\Admin\Models\NullAccount;
  *
  * @internal
  */
-class GroupTest extends \PHPUnit\Framework\TestCase
+final class GroupTest extends \PHPUnit\Framework\TestCase
 {
     protected Group $group;
 
diff --git a/tests/Models/LocalizationMapperTest.php b/tests/Models/LocalizationMapperTest.php
index bb1162d..e76b9a3 100755
--- a/tests/Models/LocalizationMapperTest.php
+++ b/tests/Models/LocalizationMapperTest.php
@@ -22,7 +22,7 @@ use phpOMS\Localization\Localization;
  *
  * @internal
  */
-class LocalizationMapperTest extends \PHPUnit\Framework\TestCase
+final class LocalizationMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/ModuleTest.php b/tests/Models/ModuleTest.php
index 3bb2364..c624092 100755
--- a/tests/Models/ModuleTest.php
+++ b/tests/Models/ModuleTest.php
@@ -22,7 +22,7 @@ use phpOMS\Module\ModuleStatus;
  *
  * @internal
  */
-class ModuleTest extends \PHPUnit\Framework\TestCase
+final class ModuleTest extends \PHPUnit\Framework\TestCase
 {
     protected Module $module;