diff --git a/api/src/Metadata/Resource/Factory/UriTemplateFactory.php b/api/src/Metadata/Resource/Factory/UriTemplateFactory.php
index e9b9fa763c..442bd86cb7 100644
--- a/api/src/Metadata/Resource/Factory/UriTemplateFactory.php
+++ b/api/src/Metadata/Resource/Factory/UriTemplateFactory.php
@@ -164,7 +164,7 @@ protected function allowsActionParameter(string $uriTemplateBase, ResourceMetada
              * - any uriTemplate, which doesn't start with the same $uriTemplateBase
              */
             if ($operation instanceof HttpOperation) {
-                if (preg_match('/^\/?'.preg_quote($uriTemplateBase, '/').'.*\\/?{.*}\\/.+$/', $operation->getUriTemplate() ?? '')) {
+                if (preg_match('/^\/?'.preg_quote($uriTemplateBase, '/').'.*\/?{.*}\/.+$/', $operation->getUriTemplate() ?? '')) {
                     return true;
                 }
             }
diff --git a/api/src/Util/ClassInfoTrait.php b/api/src/Util/ClassInfoTrait.php
index 2ed9318530..af5f150d49 100644
--- a/api/src/Util/ClassInfoTrait.php
+++ b/api/src/Util/ClassInfoTrait.php
@@ -29,7 +29,7 @@ private function getObjectClass(object $object): string {
      */
     private function getRealClassName(string $className): string {
         // __CG__: Doctrine Common Marker for Proxy (ODM < 2.0 and ORM < 3.0)
-        $positionCg = strrpos($className, '\\__CG__\\');
+        $positionCg = strrpos($className, '\__CG__\\');
 
         if (false === $positionCg) {
             return $className;
diff --git a/api/tests/Api/ContentNodes/RootColumnLayout/UpdateRootColumnLayoutTest.php b/api/tests/Api/ContentNodes/RootColumnLayout/UpdateRootColumnLayoutTest.php
index e9737718f3..80f18a63bd 100644
--- a/api/tests/Api/ContentNodes/RootColumnLayout/UpdateRootColumnLayoutTest.php
+++ b/api/tests/Api/ContentNodes/RootColumnLayout/UpdateRootColumnLayoutTest.php
@@ -62,7 +62,7 @@ public function testPatchColumnLayoutValidatesMissingParent() {
             'violations' => [
                 [
                     'propertyPath' => 'parent',
-                    'message' => 'This value should be of type App\\Entity\\ContentNode.',
+                    'message' => 'This value should be of type App\Entity\ContentNode.',
                 ],
             ],
         ]);
diff --git a/api/tests/Api/FirewallTest.php b/api/tests/Api/FirewallTest.php
index f0c456d2cc..12442d5254 100644
--- a/api/tests/Api/FirewallTest.php
+++ b/api/tests/Api/FirewallTest.php
@@ -102,7 +102,7 @@ private static function getEndPoints() {
         $responseArray = $response->toArray();
         $onlyUrls = array_map(fn (array $item) => $item['href'], $responseArray['_links']);
 
-        return array_map(fn (string $uriTemplate) => preg_replace('/\\{[^}]*}/', '', $uriTemplate), $onlyUrls);
+        return array_map(fn (string $uriTemplate) => preg_replace('/\{[^}]*}/', '', $uriTemplate), $onlyUrls);
     }
 
     private static function isProtectedByFirewall(mixed $endpoint): bool {
diff --git a/api/tests/Api/SnapshotTests/EndpointPerformanceTest.php b/api/tests/Api/SnapshotTests/EndpointPerformanceTest.php
index 9f1ade92c5..bf6c72231d 100644
--- a/api/tests/Api/SnapshotTests/EndpointPerformanceTest.php
+++ b/api/tests/Api/SnapshotTests/EndpointPerformanceTest.php
@@ -216,7 +216,7 @@ private static function getCollectionEndpoints() {
 
         $responseArray = $response->toArray();
         $onlyUrls = array_map(fn (array $item) => $item['href'], $responseArray['_links']);
-        $withoutParameters = array_map(fn (string $uriTemplate) => preg_replace('/\\{[^}]*}/', '', $uriTemplate), $onlyUrls);
+        $withoutParameters = array_map(fn (string $uriTemplate) => preg_replace('/\{[^}]*}/', '', $uriTemplate), $onlyUrls);
         $normalEndpoints = array_filter($withoutParameters, function (string $endpoint) {
             // @noinspection PhpDuplicateMatchArmBodyInspection
             return match ($endpoint) {
diff --git a/api/tests/Api/SnapshotTests/ResponseSnapshotTest.php b/api/tests/Api/SnapshotTests/ResponseSnapshotTest.php
index 84d0636807..a329fe240b 100644
--- a/api/tests/Api/SnapshotTests/ResponseSnapshotTest.php
+++ b/api/tests/Api/SnapshotTests/ResponseSnapshotTest.php
@@ -102,7 +102,7 @@ public static function getCollectionEndpoints() {
 
         $responseArray = $response->toArray();
         $onlyUrls = array_map(fn (array $item) => $item['href'], $responseArray['_links']);
-        $withoutParameters = array_map(fn (string $uriTemplate) => preg_replace('/\\{[^}]*}/', '', $uriTemplate), $onlyUrls);
+        $withoutParameters = array_map(fn (string $uriTemplate) => preg_replace('/\{[^}]*}/', '', $uriTemplate), $onlyUrls);
         $normalEndpoints = array_filter($withoutParameters, function (string $endpoint) {
             // @noinspection PhpDuplicateMatchArmBodyInspection
             return match ($endpoint) {
diff --git a/api/tests/HttpCache/PurgeHttpCacheListenerTest.php b/api/tests/HttpCache/PurgeHttpCacheListenerTest.php
index e34cc6330c..eaa4b29c3d 100644
--- a/api/tests/HttpCache/PurgeHttpCacheListenerTest.php
+++ b/api/tests/HttpCache/PurgeHttpCacheListenerTest.php
@@ -75,13 +75,13 @@ protected function setUp(): void {
         $classMetadataProphecy = $this->prophesize(ClassMetadata::class);
         $classMetadataProphecy->getAssociationMappings()->willReturn([
             'relatedDummy' => [
-                'targetEntity' => 'App\\Tests\\HttpCache\\Entity\\RelatedDummy',
+                'targetEntity' => 'App\Tests\HttpCache\Entity\RelatedDummy',
                 'isOwningSide' => true,
                 'inversedBy' => 'dummies',
                 'mappedBy' => null,
             ],
             'relatedOwningDummy' => [
-                'targetEntity' => 'App\\Tests\\HttpCache\\Entity\\RelatedOwningDummy',
+                'targetEntity' => 'App\Tests\HttpCache\Entity\RelatedOwningDummy',
                 'isOwningSide' => true,
                 'inversedBy' => 'ownedDummy',
                 'mappedBy' => null,
diff --git a/api/tests/Serializer/Normalizer/RelatedCollectionLinkNormalizerTest.php b/api/tests/Serializer/Normalizer/RelatedCollectionLinkNormalizerTest.php
index 82219f5ef3..164c4987ab 100644
--- a/api/tests/Serializer/Normalizer/RelatedCollectionLinkNormalizerTest.php
+++ b/api/tests/Serializer/Normalizer/RelatedCollectionLinkNormalizerTest.php
@@ -189,7 +189,7 @@ public function testNormalizeReplacesLinkArrayWithSingleFilteredCollectionLinkBa
         $this->uriTemplateFactory
             ->expects($this->once())
             ->method('createFromResourceClass')
-            ->with('App\\Entity\\DummyEntity')
+            ->with('App\Entity\DummyEntity')
             ->willReturn(['/relatedEntities{/id}{?test_param}', true])
         ;
         $this->uriTemplate
@@ -498,7 +498,7 @@ public function getFilterValue(): string {
         return '';
     }
 
-    #[RelatedCollectionLink('App\\Entity\\DummyEntity', ['test_param' => 'filterValue'])]
+    #[RelatedCollectionLink('App\Entity\DummyEntity', ['test_param' => 'filterValue'])]
     public function getRelatedEntities(): array {
         return [];
     }