diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 7ee8470..507e72d 100755
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -17,7 +17,7 @@ namespace Modules\Accounting\tests\Admin;
 /**
  * @internal
  */
-class AccountingTest extends \PHPUnit\Framework\TestCase
+final class AccountingTest extends \PHPUnit\Framework\TestCase
 {
     protected const NAME = 'Accounting';
 
diff --git a/tests/Controller/ApiControllerTest.php b/tests/Controller/ApiControllerTest.php
index b2cf893..c5ddba5 100644
--- a/tests/Controller/ApiControllerTest.php
+++ b/tests/Controller/ApiControllerTest.php
@@ -38,7 +38,7 @@ 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/AccountAbstractTest.php b/tests/Models/AccountAbstractTest.php
index e2610da..c37a739 100644
--- a/tests/Models/AccountAbstractTest.php
+++ b/tests/Models/AccountAbstractTest.php
@@ -21,7 +21,7 @@ use Modules\Accounting\Models\AccountAbstract;
  *
  * @internal
  */
-class AccountAbstractTest extends \PHPUnit\Framework\TestCase
+final class AccountAbstractTest extends \PHPUnit\Framework\TestCase
 {
     private $class = null;
 
diff --git a/tests/Models/BalanceL11nTest.php b/tests/Models/BalanceL11nTest.php
index f7e6e49..a415c8f 100644
--- a/tests/Models/BalanceL11nTest.php
+++ b/tests/Models/BalanceL11nTest.php
@@ -20,7 +20,7 @@ use phpOMS\Localization\ISO639x1Enum;
 /**
  * @internal
  */
-class BalanceL11nTest extends \PHPUnit\Framework\TestCase
+final class BalanceL11nTest extends \PHPUnit\Framework\TestCase
 {
     private BalanceL11n $l11n;
 
diff --git a/tests/Models/BalanceTest.php b/tests/Models/BalanceTest.php
index 9ca3c7a..1868f96 100644
--- a/tests/Models/BalanceTest.php
+++ b/tests/Models/BalanceTest.php
@@ -19,7 +19,7 @@ use Modules\Accounting\Models\Balance;
 /**
  * @internal
  */
-class BalanceTest extends \PHPUnit\Framework\TestCase
+final class BalanceTest extends \PHPUnit\Framework\TestCase
 {
     private Balance $balance;
 
diff --git a/tests/Models/CostCenterL11nTest.php b/tests/Models/CostCenterL11nTest.php
index 908a714..51fc4f9 100644
--- a/tests/Models/CostCenterL11nTest.php
+++ b/tests/Models/CostCenterL11nTest.php
@@ -20,7 +20,7 @@ use phpOMS\Localization\ISO639x1Enum;
 /**
  * @internal
  */
-class CostCenterL11nTest extends \PHPUnit\Framework\TestCase
+final class CostCenterL11nTest extends \PHPUnit\Framework\TestCase
 {
     private CostCenterL11n $l11n;
 
diff --git a/tests/Models/CostCenterMapperTest.php b/tests/Models/CostCenterMapperTest.php
index 875c45e..35989bc 100755
--- a/tests/Models/CostCenterMapperTest.php
+++ b/tests/Models/CostCenterMapperTest.php
@@ -21,7 +21,7 @@ use phpOMS\Localization\ISO639x1Enum;
 /**
  * @internal
  */
-class CostCenterMapperTest extends \PHPUnit\Framework\TestCase
+final class CostCenterMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\Accounting\Models\CostCenterMapper
diff --git a/tests/Models/CostCenterTest.php b/tests/Models/CostCenterTest.php
index 4893185..424a782 100755
--- a/tests/Models/CostCenterTest.php
+++ b/tests/Models/CostCenterTest.php
@@ -19,7 +19,7 @@ use Modules\Accounting\Models\CostCenter;
 /**
  * @internal
  */
-class CostCenterTest extends \PHPUnit\Framework\TestCase
+final class CostCenterTest extends \PHPUnit\Framework\TestCase
 {
     private CostCenter $cc;
 
diff --git a/tests/Models/CostObjectL11nTest.php b/tests/Models/CostObjectL11nTest.php
index 7f150c8..80be056 100644
--- a/tests/Models/CostObjectL11nTest.php
+++ b/tests/Models/CostObjectL11nTest.php
@@ -20,7 +20,7 @@ use phpOMS\Localization\ISO639x1Enum;
 /**
  * @internal
  */
-class CostObjectL11nTest extends \PHPUnit\Framework\TestCase
+final class CostObjectL11nTest extends \PHPUnit\Framework\TestCase
 {
     private CostObjectL11n $l11n;
 
diff --git a/tests/Models/CostObjectMapperTest.php b/tests/Models/CostObjectMapperTest.php
index e854f0e..339a8e2 100755
--- a/tests/Models/CostObjectMapperTest.php
+++ b/tests/Models/CostObjectMapperTest.php
@@ -21,7 +21,7 @@ use phpOMS\Localization\ISO639x1Enum;
 /**
  * @internal
  */
-class CostObjectMapperTest extends \PHPUnit\Framework\TestCase
+final class CostObjectMapperTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * @covers Modules\Accounting\Models\CostObjectMapper
diff --git a/tests/Models/CostObjectTest.php b/tests/Models/CostObjectTest.php
index 6994557..78a92ae 100755
--- a/tests/Models/CostObjectTest.php
+++ b/tests/Models/CostObjectTest.php
@@ -19,7 +19,7 @@ use Modules\Accounting\Models\CostObject;
 /**
  * @internal
  */
-class CostObjectTest extends \PHPUnit\Framework\TestCase
+final class CostObjectTest extends \PHPUnit\Framework\TestCase
 {
     private CostObject $cc;
 
diff --git a/tests/Models/CreditorTest.php b/tests/Models/CreditorTest.php
index f098fd2..cef7821 100644
--- a/tests/Models/CreditorTest.php
+++ b/tests/Models/CreditorTest.php
@@ -19,7 +19,7 @@ use Modules\Accounting\Models\Creditor;
 /**
  * @internal
  */
-class CreditorTest extends \PHPUnit\Framework\TestCase
+final class CreditorTest extends \PHPUnit\Framework\TestCase
 {
     private Creditor $creditor;
 
diff --git a/tests/Models/DebitorTest.php b/tests/Models/DebitorTest.php
index ebc70b9..4dc5407 100644
--- a/tests/Models/DebitorTest.php
+++ b/tests/Models/DebitorTest.php
@@ -19,7 +19,7 @@ use Modules\Accounting\Models\Debitor;
 /**
  * @internal
  */
-class DebitorTest extends \PHPUnit\Framework\TestCase
+final class DebitorTest extends \PHPUnit\Framework\TestCase
 {
     private Debitor $creditor;