diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index d46e86e..814af5b 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\EventManagement\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'EventManagement';
 
diff --git a/tests/Models/EventMapperTest.php b/tests/Models/EventMapperTest.php
index 6529a4d..abd4557 100755
--- a/tests/Models/EventMapperTest.php
+++ b/tests/Models/EventMapperTest.php
@@ -27,7 +27,7 @@ use phpOMS\Utils\RnG\Text;
 /**
  * @internal
  */
-class EventMapperTest extends \PHPUnit\Framework\TestCase
+final class EventMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\EventManagement\Models\EventMapper
diff --git a/tests/Models/EventTest.php b/tests/Models/EventTest.php
index be11e16..94f0c35 100755
--- a/tests/Models/EventTest.php
+++ b/tests/Models/EventTest.php
@@ -23,7 +23,7 @@ use phpOMS\Localization\Money;
 /**
  * @internal
  */
-class EventTest extends \PHPUnit\Framework\TestCase
+final class EventTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\EventManagement\Models\Event