diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 4431cc1..0151b9b 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\Knowledgebase\tests\Admin;
 /**
  * @internal
  */
-class AdminTest extends \PHPUnit\Framework\TestCase
+final class AdminTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Knowledgebase';
 
diff --git a/tests/Models/WikiAppMapperTest.php b/tests/Models/WikiAppMapperTest.php
index e7f00ba..f1c74a0 100755
--- a/tests/Models/WikiAppMapperTest.php
+++ b/tests/Models/WikiAppMapperTest.php
@@ -23,7 +23,7 @@ use phpOMS\Utils\RnG\Text;
  *
  * @internal
  */
-class WikiAppMapperTest extends \PHPUnit\Framework\TestCase
+final class WikiAppMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/WikiAppTest.php b/tests/Models/WikiAppTest.php
index fb1ae34..5517bd0 100755
--- a/tests/Models/WikiAppTest.php
+++ b/tests/Models/WikiAppTest.php
@@ -21,7 +21,7 @@ use Modules\Knowledgebase\Models\WikiApp;
  *
  * @internal
  */
-class WikiAppTest extends \PHPUnit\Framework\TestCase
+final class WikiAppTest extends \PHPUnit\Framework\TestCase
 {
     protected WikiApp $app;
 
diff --git a/tests/Models/WikiCategoryMapperTest.php b/tests/Models/WikiCategoryMapperTest.php
index ddc5eb3..2a68490 100755
--- a/tests/Models/WikiCategoryMapperTest.php
+++ b/tests/Models/WikiCategoryMapperTest.php
@@ -24,7 +24,7 @@ use phpOMS\Utils\RnG\Text;
  *
  * @internal
  */
-class WikiCategoryMapperTest extends \PHPUnit\Framework\TestCase
+final class WikiCategoryMapperTest extends \PHPUnit\Framework\TestCase
 {
     protected WikiCategory $category;
 
diff --git a/tests/Models/WikiCategoryTest.php b/tests/Models/WikiCategoryTest.php
index 15a15a7..4e85b1f 100755
--- a/tests/Models/WikiCategoryTest.php
+++ b/tests/Models/WikiCategoryTest.php
@@ -23,7 +23,7 @@ use Modules\Knowledgebase\Models\WikiCategory;
  *
  * @internal
  */
-class WikiCategoryTest extends \PHPUnit\Framework\TestCase
+final class WikiCategoryTest extends \PHPUnit\Framework\TestCase
 {
     protected WikiCategory $category;
 
diff --git a/tests/Models/WikiDocMapperTest.php b/tests/Models/WikiDocMapperTest.php
index c9a981b..7bd68cb 100755
--- a/tests/Models/WikiDocMapperTest.php
+++ b/tests/Models/WikiDocMapperTest.php
@@ -25,7 +25,7 @@ use phpOMS\Utils\RnG\Text;
  *
  * @internal
  */
-class WikiDocMapperTest extends \PHPUnit\Framework\TestCase
+final class WikiDocMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @testdox The model can be created and read from the database
diff --git a/tests/Models/WikiDocTest.php b/tests/Models/WikiDocTest.php
index be081f9..e7c89e5 100755
--- a/tests/Models/WikiDocTest.php
+++ b/tests/Models/WikiDocTest.php
@@ -25,7 +25,7 @@ use Modules\Tag\Models\NullTag;
  *
  * @internal
  */
-class WikiDocTest extends \PHPUnit\Framework\TestCase
+final class WikiDocTest extends \PHPUnit\Framework\TestCase
 {
     protected WikiDoc $doc;