diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index a1209ea..a121bf8 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -23,7 +23,7 @@ use phpOMS\Uri\HttpUri;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Navigation';
 
diff --git a/tests/Controller/SearchControllerTest.php b/tests/Controller/SearchControllerTest.php
index 868993f..bcbd0bb 100755
--- a/tests/Controller/SearchControllerTest.php
+++ b/tests/Controller/SearchControllerTest.php
@@ -38,7 +38,7 @@ use phpOMS\Utils\TestUtils;
  *
  * @internal
  */
-class SearchControllerTest extends \PHPUnit\Framework\TestCase
+final class SearchControllerTest extends \PHPUnit\Framework\TestCase
 {
     protected ApplicationAbstract $app;
 
diff --git a/tests/Views/NavigationViewTest.php b/tests/Views/NavigationViewTest.php
index 05bb7cc..302e047 100755
--- a/tests/Views/NavigationViewTest.php
+++ b/tests/Views/NavigationViewTest.php
@@ -19,7 +19,7 @@ use Modules\Navigation\Views\NavigationView;
 /**
  * @internal
  */
-class NavigationViewTest extends \PHPUnit\Framework\TestCase
+final class NavigationViewTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\Navigation\Views\NavigationView