diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 820de87..3216b07 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\Helper\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Helper';
 
diff --git a/tests/Models/ReportMapperTest.php b/tests/Models/ReportMapperTest.php
index 6e217a6..0c3c8f1 100755
--- a/tests/Models/ReportMapperTest.php
+++ b/tests/Models/ReportMapperTest.php
@@ -28,7 +28,7 @@ use Modules\Media\Models\Media;
  *
  * @internal
  */
-class ReportMapperTest extends \PHPUnit\Framework\TestCase
+final class ReportMapperTest extends \PHPUnit\Framework\TestCase
 {
     private function createTemplate()
     {
diff --git a/tests/Models/ReportTest.php b/tests/Models/ReportTest.php
index 3c29b49..f3eb9cb 100755
--- a/tests/Models/ReportTest.php
+++ b/tests/Models/ReportTest.php
@@ -25,7 +25,7 @@ use Modules\Media\Models\NullCollection;
  *
  * @internal
  */
-class ReportTest extends \PHPUnit\Framework\TestCase
+final class ReportTest extends \PHPUnit\Framework\TestCase
 {
     protected Report $report;
 
diff --git a/tests/Models/TemplateMapperTest.php b/tests/Models/TemplateMapperTest.php
index 9eb4f5f..6416d5a 100755
--- a/tests/Models/TemplateMapperTest.php
+++ b/tests/Models/TemplateMapperTest.php
@@ -27,7 +27,7 @@ use Modules\Media\Models\Media;
  *
  * @internal
  */
-class TemplateMapperTest extends \PHPUnit\Framework\TestCase
+final class TemplateMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/TemplateTest.php b/tests/Models/TemplateTest.php
index 7a1309d..0c36d83 100755
--- a/tests/Models/TemplateTest.php
+++ b/tests/Models/TemplateTest.php
@@ -27,7 +27,7 @@ use Modules\Organization\Models\NullUnit;
  *
  * @internal
  */
-class TemplateTest extends \PHPUnit\Framework\TestCase
+final class TemplateTest extends \PHPUnit\Framework\TestCase
 {
     protected Template $template;