diff --git a/bin/phpunit b/bin/phpunit
index a1600d5e..84975dbb 100755
--- a/bin/phpunit
+++ b/bin/phpunit
@@ -1,19 +1,10 @@
 #!/usr/bin/env php
 <?php
-
-if (!file_exists(dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
-    echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\n";
+if (!file_exists(dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit.php')) {
+    echo "Unable to find the `simple-phpunit.php` script in `vendor/symfony/phpunit-bridge/bin/`.\n";
     exit(1);
 }
-
-if (false === getenv('SYMFONY_PHPUNIT_VERSION')) {
-    putenv('SYMFONY_PHPUNIT_VERSION=7.5');
-}
-if (false === getenv('SYMFONY_PHPUNIT_REMOVE')) {
-    putenv('SYMFONY_PHPUNIT_REMOVE=');
-}
 if (false === getenv('SYMFONY_PHPUNIT_DIR')) {
     putenv('SYMFONY_PHPUNIT_DIR='.__DIR__.'/.phpunit');
 }
-
-require dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit';
+require dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit.php';
\ No newline at end of file
diff --git a/tests/Controller/AdminPages/AbstractAdminControllerTest.php b/tests/Controller/AdminPages/AbstractAdminControllerTest.php
index 789d897f..4a191b59 100644
--- a/tests/Controller/AdminPages/AbstractAdminControllerTest.php
+++ b/tests/Controller/AdminPages/AbstractAdminControllerTest.php
@@ -32,11 +32,6 @@ abstract class AbstractAdminControllerTest extends WebTestCase
     protected static $base_path = 'not_valid';
     protected static $entity_class = 'not valid';
 
-    public function setUp()
-    {
-        parent::setUp();
-    }
-
     public function readDataProvider()
     {
         return [
diff --git a/tests/Controller/RedirectControllerTest.php b/tests/Controller/RedirectControllerTest.php
index d49e3963..58bbb2c9 100644
--- a/tests/Controller/RedirectControllerTest.php
+++ b/tests/Controller/RedirectControllerTest.php
@@ -34,7 +34,7 @@ class RedirectControllerTest extends WebTestCase
     protected $userRepo;
     protected $client;
 
-    public function setUp()
+    public function setUp() : void
     {
         $this->client = static::createClient([], [
             'PHP_AUTH_USER' => 'user',
diff --git a/tests/Entity/StructuralDBElementTest.php b/tests/Entity/StructuralDBElementTest.php
index eef6cb2a..cd4cb5bf 100644
--- a/tests/Entity/StructuralDBElementTest.php
+++ b/tests/Entity/StructuralDBElementTest.php
@@ -39,7 +39,7 @@ class StructuralDBElementTest extends TestCase
     protected $child1_1;
     protected $child1_2;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp(); // TODO: Change the autogenerated stub
 
diff --git a/tests/Entity/UserSystem/PermissionsEmbedTest.php b/tests/Entity/UserSystem/PermissionsEmbedTest.php
index 936be474..db62308a 100644
--- a/tests/Entity/UserSystem/PermissionsEmbedTest.php
+++ b/tests/Entity/UserSystem/PermissionsEmbedTest.php
@@ -27,10 +27,6 @@ use PHPUnit\Framework\TestCase;
 
 class PermissionsEmbedTest extends TestCase
 {
-    public function setUp()
-    {
-        parent::setUp(); // TODO: Change the autogenerated stub
-    }
 
     public function testGetPermissionValue()
     {
diff --git a/tests/Helpers/BBCodeToMarkdownConverterTest.php b/tests/Helpers/BBCodeToMarkdownConverterTest.php
index 34cfbfef..0becdb9d 100644
--- a/tests/Helpers/BBCodeToMarkdownConverterTest.php
+++ b/tests/Helpers/BBCodeToMarkdownConverterTest.php
@@ -28,7 +28,7 @@ class BBCodeToMarkdownConverterTest extends TestCase
 {
     protected $converter;
 
-    public function setUp()
+    public function setUp() : void
     {
         $this->converter = new BBCodeToMarkdownConverter();
     }
diff --git a/tests/Helpers/TreeViewNodeTest.php b/tests/Helpers/TreeViewNodeTest.php
index d3fda45a..edd6fe82 100644
--- a/tests/Helpers/TreeViewNodeTest.php
+++ b/tests/Helpers/TreeViewNodeTest.php
@@ -35,7 +35,7 @@ class TreeViewNodeTest extends TestCase
      */
     protected $node2;
 
-    public function setUp()
+    public function setUp() : void
     {
         $sub_nodes = [];
         $sub_nodes[] = new TreeViewNode('Subnode 1');
diff --git a/tests/Security/UserCheckerTest.php b/tests/Security/UserCheckerTest.php
index 283fa2d9..8ab27574 100644
--- a/tests/Security/UserCheckerTest.php
+++ b/tests/Security/UserCheckerTest.php
@@ -31,7 +31,7 @@ class UserCheckerTest extends TestCase
 {
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         $this->service = new UserChecker();
     }
diff --git a/tests/Services/AmountFormatterTest.php b/tests/Services/AmountFormatterTest.php
index cb2db8ea..676f617b 100644
--- a/tests/Services/AmountFormatterTest.php
+++ b/tests/Services/AmountFormatterTest.php
@@ -32,7 +32,7 @@ class AmountFormatterTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp(); // TODO: Change the autogenerated stub
 
diff --git a/tests/Services/Attachments/AttachmentPathResolverTest.php b/tests/Services/Attachments/AttachmentPathResolverTest.php
index 0c5227f7..164e02a6 100644
--- a/tests/Services/Attachments/AttachmentPathResolverTest.php
+++ b/tests/Services/Attachments/AttachmentPathResolverTest.php
@@ -48,7 +48,7 @@ class AttachmentPathResolverTest extends WebTestCase
         self::$footprint_path = self::$projectDir.'/public/img/footprints';
     }
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass() : void
     {
         parent::setUpBeforeClass();
 
diff --git a/tests/Services/Attachments/AttachmentURLGeneratorTest.php b/tests/Services/Attachments/AttachmentURLGeneratorTest.php
index 7cc1d4f2..47d5ffe1 100644
--- a/tests/Services/Attachments/AttachmentURLGeneratorTest.php
+++ b/tests/Services/Attachments/AttachmentURLGeneratorTest.php
@@ -30,7 +30,7 @@ class AttachmentURLGeneratorTest extends WebTestCase
 
     protected static $service;
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass() : void
     {
         //Get an service instance.
         self::bootKernel();
diff --git a/tests/Services/Attachments/BuiltinAttachmentsFinderTest.php b/tests/Services/Attachments/BuiltinAttachmentsFinderTest.php
index da0b79e8..6f74830d 100644
--- a/tests/Services/Attachments/BuiltinAttachmentsFinderTest.php
+++ b/tests/Services/Attachments/BuiltinAttachmentsFinderTest.php
@@ -34,7 +34,7 @@ class BuiltinAttachmentsFinderTest extends WebTestCase
         '%FOOTPRINTS_3D%/test.jpg', '%FOOTPRINTS_3D%/hallo.txt',
     ];
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass() : void
     {
         //Get an service instance.
         self::bootKernel();
diff --git a/tests/Services/Attachments/FileTypeFilterToolsTest.php b/tests/Services/Attachments/FileTypeFilterToolsTest.php
index c673753b..d93354ab 100644
--- a/tests/Services/Attachments/FileTypeFilterToolsTest.php
+++ b/tests/Services/Attachments/FileTypeFilterToolsTest.php
@@ -28,7 +28,7 @@ class FileTypeFilterToolsTest extends WebTestCase
 {
     protected static $service;
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass() : void
     {
         self::bootKernel();
         self::$service = self::$container->get(FileTypeFilterTools::class);
diff --git a/tests/Services/ElementTypeNameGeneratorTest.php b/tests/Services/ElementTypeNameGeneratorTest.php
index 12b2b968..4a90e964 100644
--- a/tests/Services/ElementTypeNameGeneratorTest.php
+++ b/tests/Services/ElementTypeNameGeneratorTest.php
@@ -40,7 +40,7 @@ class ElementTypeNameGeneratorTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
 
diff --git a/tests/Services/EntityImporterTest.php b/tests/Services/EntityImporterTest.php
index 36a4912c..a16e5475 100644
--- a/tests/Services/EntityImporterTest.php
+++ b/tests/Services/EntityImporterTest.php
@@ -35,7 +35,7 @@ class EntityImporterTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
 
diff --git a/tests/Services/FAIconGeneratorTest.php b/tests/Services/FAIconGeneratorTest.php
index 77ba60c0..ceef26df 100644
--- a/tests/Services/FAIconGeneratorTest.php
+++ b/tests/Services/FAIconGeneratorTest.php
@@ -32,7 +32,7 @@ class FAIconGeneratorTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp(); // TODO: Change the autogenerated stub
 
diff --git a/tests/Services/PermissionResolverTest.php b/tests/Services/PermissionResolverTest.php
index 3e514014..d31022ec 100644
--- a/tests/Services/PermissionResolverTest.php
+++ b/tests/Services/PermissionResolverTest.php
@@ -38,7 +38,7 @@ class PermissionResolverTest extends WebTestCase
     protected $user_withoutGroup;
     protected $group;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp(); // TODO: Change the autogenerated stub
 
diff --git a/tests/Services/PricedetailHelperTest.php b/tests/Services/PricedetailHelperTest.php
index 50b95c1a..c726e6ee 100644
--- a/tests/Services/PricedetailHelperTest.php
+++ b/tests/Services/PricedetailHelperTest.php
@@ -35,7 +35,7 @@ class PricedetailHelperTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         parent::setUp();
         //Get an service instance.
diff --git a/tests/Services/SIFormatterTest.php b/tests/Services/SIFormatterTest.php
index daea7612..d1798f9b 100644
--- a/tests/Services/SIFormatterTest.php
+++ b/tests/Services/SIFormatterTest.php
@@ -31,7 +31,7 @@ class SIFormatterTest extends WebTestCase
      */
     protected $service;
 
-    public function setUp()
+    public function setUp() : void
     {
         //Get an service instance.
         self::bootKernel();