diff --git a/src/Attribute/Ignore.php b/src/Attribute/Ignore.php
index 2fbaba73d..d37939ce2 100644
--- a/src/Attribute/Ignore.php
+++ b/src/Attribute/Ignore.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/Processor/MapQueryStringProcessor.php b/src/Processor/MapQueryStringProcessor.php
index 4d11fd423..0e6aceb66 100644
--- a/src/Processor/MapQueryStringProcessor.php
+++ b/src/Processor/MapQueryStringProcessor.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/Processor/MapRequestPayloadProcessor.php b/src/Processor/MapRequestPayloadProcessor.php
index 6354f5a34..f4ccbe87c 100644
--- a/src/Processor/MapRequestPayloadProcessor.php
+++ b/src/Processor/MapRequestPayloadProcessor.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/Processor/NullablePropertyProcessor.php b/src/Processor/NullablePropertyProcessor.php
index a46f90a03..3d728d044 100644
--- a/src/Processor/NullablePropertyProcessor.php
+++ b/src/Processor/NullablePropertyProcessor.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/PropertyDescriber/PropertyDescriber.php b/src/PropertyDescriber/PropertyDescriber.php
index d18e480b0..3b46f5ef9 100644
--- a/src/PropertyDescriber/PropertyDescriber.php
+++ b/src/PropertyDescriber/PropertyDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber.php b/src/RouteDescriber/RouteArgumentDescriber.php
index c5a9379ba..6cff6cd82 100644
--- a/src/RouteDescriber/RouteArgumentDescriber.php
+++ b/src/RouteDescriber/RouteArgumentDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber/RouteArgumentDescriberInterface.php b/src/RouteDescriber/RouteArgumentDescriber/RouteArgumentDescriberInterface.php
index 3e1e9b37e..fdc8c9007 100644
--- a/src/RouteDescriber/RouteArgumentDescriber/RouteArgumentDescriberInterface.php
+++ b/src/RouteDescriber/RouteArgumentDescriber/RouteArgumentDescriberInterface.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryParameterDescriber.php b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryParameterDescriber.php
index d3094b7f5..eb5ea359c 100644
--- a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryParameterDescriber.php
+++ b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryParameterDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryStringDescriber.php b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryStringDescriber.php
index 85c0535f4..593b13382 100644
--- a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryStringDescriber.php
+++ b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapQueryStringDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriber.php b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriber.php
index d4965c20d..adf9c06ff 100644
--- a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriber.php
+++ b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapUploadedFileDescriber.php b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapUploadedFileDescriber.php
index e3f4a81cc..62be91690 100644
--- a/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapUploadedFileDescriber.php
+++ b/src/RouteDescriber/RouteArgumentDescriber/SymfonyMapUploadedFileDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/TypeDescriber/GenericClassDescriber.php b/src/TypeDescriber/GenericClassDescriber.php
index 29a101e8c..2bf03f04f 100644
--- a/src/TypeDescriber/GenericClassDescriber.php
+++ b/src/TypeDescriber/GenericClassDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/TypeDescriber/GenericCollectionDescriber.php b/src/TypeDescriber/GenericCollectionDescriber.php
index 7d46814d2..a4f40b6c3 100644
--- a/src/TypeDescriber/GenericCollectionDescriber.php
+++ b/src/TypeDescriber/GenericCollectionDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/src/TypeDescriber/TemplateDescriber.php b/src/TypeDescriber/TemplateDescriber.php
index cfe60e27e..c763790ac 100644
--- a/src/TypeDescriber/TemplateDescriber.php
+++ b/src/TypeDescriber/TemplateDescriber.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/ConfigurableContainerFactory.php b/tests/Functional/ConfigurableContainerFactory.php
index 6ce21bbd4..85aada8de 100644
--- a/tests/Functional/ConfigurableContainerFactory.php
+++ b/tests/Functional/ConfigurableContainerFactory.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Controller/ApiController.php b/tests/Functional/Controller/ApiController.php
index 9b6d1a7a2..6730a1747 100644
--- a/tests/Functional/Controller/ApiController.php
+++ b/tests/Functional/Controller/ApiController.php
@@ -152,7 +152,7 @@ public function submitUserTypeAction(): void
 
     #[Route('/test/{user}', methods: ['GET'], schemes: ['https'], requirements: ['user' => '/foo/'])]
     #[OA\Response(response: 200, description: 'sucessful')]
-    public function userAction()
+    public function userAction(): void
     {
     }
 
@@ -164,7 +164,7 @@ public function userAction()
      * @deprecated
      */
     #[Route('/deprecated', methods: ['GET'])]
-    public function deprecatedAction()
+    public function deprecatedAction(): void
     {
     }
 
@@ -172,7 +172,7 @@ public function deprecatedAction()
      * This action is not documented. It is excluded by the config.
      */
     #[Route('/admin', methods: ['GET'])]
-    public function adminAction()
+    public function adminAction(): void
     {
     }
 
@@ -221,7 +221,7 @@ public function formWithModelRenamed(): void
     #[Security(name: 'api_key')]
     #[Security(name: 'basic')]
     #[Security(name: 'oauth2', scopes: ['scope_1'])]
-    public function securityAction()
+    public function securityAction(): void
     {
     }
 
@@ -229,7 +229,7 @@ public function securityAction()
     #[OA\Response(response: 201, description: '')]
     #[Security(name: 'api_key')]
     #[Security(name: null)]
-    public function securityActionOverride()
+    public function securityActionOverride(): void
     {
     }
 
@@ -253,7 +253,7 @@ public function symfonyConstraintsAction(): void
         ref: '#/components/responses/201',
     )]
     #[Route('/configReference', methods: ['GET'])]
-    public function configReferenceAction()
+    public function configReferenceAction(): void
     {
     }
 
@@ -267,7 +267,7 @@ public function operationsWithOtherAnnotations(): void
 
     #[Route('/areas/new', methods: ['GET', 'POST'])]
     #[Areas(['area', 'area2'])]
-    public function newAreaAction()
+    public function newAreaAction(): void
     {
     }
 
@@ -291,7 +291,7 @@ public function discriminatorMappingConfiguredWithFileAction(): void
 
     #[Route('/named_route-operation-id', name: 'named_route_operation_id', methods: ['GET', 'POST'])]
     #[OA\Response(response: 200, description: 'success')]
-    public function namedRouteOperationIdAction()
+    public function namedRouteOperationIdAction(): void
     {
     }
 
@@ -299,7 +299,7 @@ public function namedRouteOperationIdAction()
     #[OA\Get(operationId: 'get-custom-operation-id')]
     #[OA\Post(operationId: 'post-custom-operation-id')]
     #[OA\Response(response: 200, description: 'success')]
-    public function customOperationIdAction()
+    public function customOperationIdAction(): void
     {
     }
 
@@ -478,7 +478,7 @@ public function fetchArticleActionWithAttributes(): void
 
     #[Areas(['area', 'area2'])]
     #[Route('/areas_attributes/new', methods: ['GET', 'POST'])]
-    public function newAreaActionAttributes()
+    public function newAreaActionAttributes(): void
     {
     }
 
@@ -487,7 +487,7 @@ public function newAreaActionAttributes()
     #[Security(name: 'api_key')]
     #[Security(name: 'basic')]
     #[Security(name: 'oauth2', scopes: ['scope_1'])]
-    public function securityActionAttributes()
+    public function securityActionAttributes(): void
     {
     }
 
@@ -495,7 +495,7 @@ public function securityActionAttributes()
     #[OA\Response(response: '201', description: '')]
     #[Security(name: 'api_key')]
     #[Security(name: null)]
-    public function securityOverrideActionAttributes()
+    public function securityOverrideActionAttributes(): void
     {
     }
 
@@ -504,7 +504,7 @@ public function securityOverrideActionAttributes()
     public function inlinePathParameters(
         #[OA\PathParameter]
         string $product_id,
-    ) {
+    ): void {
     }
 
     #[Route('/enum')]
diff --git a/tests/Functional/Controller/ClassApiController.php b/tests/Functional/Controller/ClassApiController.php
index 5dddb838a..9e30aba66 100644
--- a/tests/Functional/Controller/ClassApiController.php
+++ b/tests/Functional/Controller/ClassApiController.php
@@ -21,7 +21,7 @@ class ClassApiController
 {
     #[OAT\Response(response: 201, description: '')]
     #[Route('/security/class')]
-    public function securityAction()
+    public function securityAction(): void
     {
     }
 }
diff --git a/tests/Functional/Controller/Controller2209.php b/tests/Functional/Controller/Controller2209.php
index cafc55fcf..16f6fd2a4 100644
--- a/tests/Functional/Controller/Controller2209.php
+++ b/tests/Functional/Controller/Controller2209.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Controller/GenericTypesController.php b/tests/Functional/Controller/GenericTypesController.php
index eb0783a1c..7500c5f03 100644
--- a/tests/Functional/Controller/GenericTypesController.php
+++ b/tests/Functional/Controller/GenericTypesController.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Controller/InvokableController.php b/tests/Functional/Controller/InvokableController.php
index 9ebd907d7..91360d5be 100644
--- a/tests/Functional/Controller/InvokableController.php
+++ b/tests/Functional/Controller/InvokableController.php
@@ -21,7 +21,7 @@
 #[Route('/api/invoke', host: 'api.example.com', name: 'invokable', methods: ['GET'])]
 class InvokableController
 {
-    public function __invoke()
+    public function __invoke(): void
     {
     }
 }
diff --git a/tests/Functional/Controller/MapQueryParameterController.php b/tests/Functional/Controller/MapQueryParameterController.php
index 03ed4b7fb..1f202afb2 100644
--- a/tests/Functional/Controller/MapQueryParameterController.php
+++ b/tests/Functional/Controller/MapQueryParameterController.php
@@ -30,7 +30,7 @@ public function fetchArticleFromMapQueryParameter(
         string $someString,
         #[MapQueryParameter]
         array $someArray,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_parameter_validate_filters', methods: ['GET'])]
@@ -62,7 +62,7 @@ public function fetchArticleFromMapQueryParameterValidateFilters(
     public function fetchArticleFromMapQueryParameterNullable(
         #[MapQueryParameter]
         ?int $id,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_parameter_default', methods: ['GET'])]
@@ -70,7 +70,7 @@ public function fetchArticleFromMapQueryParameterNullable(
     public function fetchArticleFromMapQueryParameterDefault(
         #[MapQueryParameter]
         int $id = 123,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_parameter_overwrite_parameters', methods: ['GET'])]
diff --git a/tests/Functional/Controller/MapQueryStringController.php b/tests/Functional/Controller/MapQueryStringController.php
index 1ce82e4a6..dbef55f47 100644
--- a/tests/Functional/Controller/MapQueryStringController.php
+++ b/tests/Functional/Controller/MapQueryStringController.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
@@ -30,7 +28,7 @@ class MapQueryStringController
     public function fetchArticleFromMapQueryString(
         #[MapQueryString]
         SymfonyMapQueryString $article81Query,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_string_nullable', methods: ['GET'])]
@@ -38,7 +36,7 @@ public function fetchArticleFromMapQueryString(
     public function fetchArticleFromMapQueryStringNullable(
         #[MapQueryString]
         ?SymfonyMapQueryString $article81Query,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_string_passes_validation_groups', methods: ['GET'])]
@@ -46,7 +44,7 @@ public function fetchArticleFromMapQueryStringNullable(
     public function fetchArticleFromMapQueryStringHandlesValidationGroups(
         #[MapQueryString(validationGroups: ['test'])]
         SymfonyConstraintsWithValidationGroups $symfonyConstraintsWithValidationGroups,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_string_overwrite_parameters', methods: ['GET'])]
@@ -94,7 +92,7 @@ public function fetchArticleWithManyParameters(
         SortQueryModel $sortQuery,
         #[MapQueryString]
         ArrayQueryModel $arrayQuery,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_query_string_many_parameters_optional')]
@@ -108,6 +106,6 @@ public function fetchArticleWithManyOptionalParameters(
         ?SortQueryModel $sortQuery,
         #[MapQueryString]
         ?ArrayQueryModel $arrayQuery,
-    ) {
+    ): void {
     }
 }
diff --git a/tests/Functional/Controller/MapRequestPayloadController.php b/tests/Functional/Controller/MapRequestPayloadController.php
index f0a6d1f25..beda5d06d 100644
--- a/tests/Functional/Controller/MapRequestPayloadController.php
+++ b/tests/Functional/Controller/MapRequestPayloadController.php
@@ -26,7 +26,7 @@ class MapRequestPayloadController
     public function createArticleFromMapRequestPayload(
         #[MapRequestPayload]
         Article81 $article81,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_request_payload_nullable', methods: ['POST'])]
@@ -34,7 +34,7 @@ public function createArticleFromMapRequestPayload(
     public function createArticleFromMapRequestPayloadNullable(
         #[MapRequestPayload]
         ?Article81 $article81,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_request_payload_overwrite', methods: ['POST'])]
@@ -68,6 +68,6 @@ public function createArticleFromMapRequestPayloadHandlesAlreadySetContent(
     public function createArticleFromMapRequestPayloadPassedValidationGroups(
         #[MapRequestPayload(validationGroups: ['test'])]
         SymfonyConstraintsWithValidationGroups $symfonyConstraintsWithValidationGroups,
-    ) {
+    ): void {
     }
 }
diff --git a/tests/Functional/Controller/MapUploadedFileController.php b/tests/Functional/Controller/MapUploadedFileController.php
index 19a7e1a13..3c131ca81 100644
--- a/tests/Functional/Controller/MapUploadedFileController.php
+++ b/tests/Functional/Controller/MapUploadedFileController.php
@@ -23,7 +23,7 @@ class MapUploadedFileController
     public function createUploadFromMapUploadedFilePayload(
         #[MapUploadedFile]
         UploadedFile $upload,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_uploaded_file_nullable', methods: ['POST'])]
@@ -31,7 +31,7 @@ public function createUploadFromMapUploadedFilePayload(
     public function createUploadFromMapUploadedFilePayloadNullable(
         #[MapUploadedFile]
         ?UploadedFile $upload,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_uploaded_file_multiple', methods: ['POST'])]
@@ -41,7 +41,7 @@ public function createUploadFromMapUploadedFilePayloadMultiple(
         UploadedFile $firstUpload,
         #[MapUploadedFile]
         UploadedFile $secondUpload,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_uploaded_file_add_to_existing', methods: ['POST'])]
@@ -83,7 +83,7 @@ public function createUploadFromMapUploadedFileOverwrite(
     public function createArrayUploadFromMapUploadedFilePayload(
         #[MapUploadedFile]
         array $upload,
-    ) {
+    ): void {
     }
 
     #[Route('/article_map_uploaded_file_variadic', methods: ['POST'])]
@@ -91,6 +91,6 @@ public function createArrayUploadFromMapUploadedFilePayload(
     public function createVariadicUploadFromMapUploadedFilePayload(
         #[MapUploadedFile]
         UploadedFile ...$upload,
-    ) {
+    ): void {
     }
 }
diff --git a/tests/Functional/Controller/OpenApiTagController.php b/tests/Functional/Controller/OpenApiTagController.php
index 489cf6a91..5070da535 100644
--- a/tests/Functional/Controller/OpenApiTagController.php
+++ b/tests/Functional/Controller/OpenApiTagController.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
@@ -21,13 +19,13 @@ class OpenApiTagController
 {
     #[Route('/some_post', methods: ['POST'])]
     #[OA\Response(response: '200', description: '')]
-    public function somePost()
+    public function somePost(): void
     {
     }
 
     #[Route('/some_get', methods: ['GET'])]
     #[OA\Response(response: '200', description: '')]
-    public function someGet()
+    public function someGet(): void
     {
     }
 }
diff --git a/tests/Functional/Controller/OperationIdController.php b/tests/Functional/Controller/OperationIdController.php
index 5927bb9ef..83fdcd5b5 100644
--- a/tests/Functional/Controller/OperationIdController.php
+++ b/tests/Functional/Controller/OperationIdController.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Controller/PromotedPropertiesController81.php b/tests/Functional/Controller/PromotedPropertiesController81.php
index fc7ef0ff4..6f4aa8bf8 100644
--- a/tests/Functional/Controller/PromotedPropertiesController81.php
+++ b/tests/Functional/Controller/PromotedPropertiesController81.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Controller/SecuredApiController.php b/tests/Functional/Controller/SecuredApiController.php
index d6441ccc4..07e9e0bf1 100644
--- a/tests/Functional/Controller/SecuredApiController.php
+++ b/tests/Functional/Controller/SecuredApiController.php
@@ -22,20 +22,20 @@
 class SecuredApiController
 {
     #[Route('/article/{id}', methods: 'GET')]
-    public function fetchArticleAction()
+    public function fetchArticleAction(): void
     {
     }
 
     #[Route('/article', methods: 'POST')]
     #[IsGranted('ROLE_ADMIN')]
-    public function newArticleAction(Article $newArticle)
+    public function newArticleAction(Article $newArticle): void
     {
     }
 
     #[Route('/article/{id}', methods: 'PATCH')]
     #[IsGranted('ROLE_ADMIN')]
     #[IsGranted('ROLE_UPDATE_ARTICLE', subject: 'newArticle')]
-    public function updateArticleAction(Article $newArticle)
+    public function updateArticleAction(Article $newArticle): void
     {
     }
 
@@ -44,7 +44,7 @@ public function updateArticleAction(Article $newArticle)
         security: [] // Explicitly set to empty array
     )]
     #[IsGranted('ROLE_USER')]
-    public function userDocumentation(Article $newArticle)
+    public function userDocumentation(Article $newArticle): void
     {
     }
 
@@ -54,7 +54,7 @@ public function userDocumentation(Article $newArticle)
         name: 'BearerAuthCustom',
         scopes: ['read:user'],
     )]
-    public function userDocumentationSecurityAttribute(Article $newArticle)
+    public function userDocumentationSecurityAttribute(Article $newArticle): void
     {
     }
 }
diff --git a/tests/Functional/Controller/UndocumentedController.php b/tests/Functional/Controller/UndocumentedController.php
index 11bb39814..b443944cb 100644
--- a/tests/Functional/Controller/UndocumentedController.php
+++ b/tests/Functional/Controller/UndocumentedController.php
@@ -20,7 +20,7 @@ class UndocumentedController
      * This path is excluded by the config (only /api allowed).
      */
     #[Route('/undocumented', methods: ['GET'])]
-    public function undocumentedAction()
+    public function undocumentedAction(): void
     {
     }
 }
diff --git a/tests/Functional/Entity/ArrayItems/Bar.php b/tests/Functional/Entity/ArrayItems/Bar.php
index 1e5e39a2a..a447ecdd0 100644
--- a/tests/Functional/Entity/ArrayItems/Bar.php
+++ b/tests/Functional/Entity/ArrayItems/Bar.php
@@ -22,7 +22,7 @@ class Bar
      */
     public $moreThings;
 
-    public function addThing(array $thing)
+    public function addThing(array $thing): void
     {
     }
 }
diff --git a/tests/Functional/Entity/ArrayItems/Dictionary.php b/tests/Functional/Entity/ArrayItems/Dictionary.php
index ddad8b768..002d37d4e 100644
--- a/tests/Functional/Entity/ArrayItems/Dictionary.php
+++ b/tests/Functional/Entity/ArrayItems/Dictionary.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/Article.php b/tests/Functional/Entity/Article.php
index 2de8ac7c5..e48581c70 100644
--- a/tests/Functional/Entity/Article.php
+++ b/tests/Functional/Entity/Article.php
@@ -16,11 +16,11 @@
 class Article
 {
     #[Groups(['light'])]
-    public function setAuthor(User $author)
+    public function setAuthor(User $author): void
     {
     }
 
-    public function setContent(string $content)
+    public function setContent(string $content): void
     {
     }
 }
diff --git a/tests/Functional/Entity/EntityWithIgnoredProperty.php b/tests/Functional/Entity/EntityWithIgnoredProperty.php
index 09bdf4f38..cb335cc8e 100644
--- a/tests/Functional/Entity/EntityWithIgnoredProperty.php
+++ b/tests/Functional/Entity/EntityWithIgnoredProperty.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/GenericTypes.php b/tests/Functional/Entity/GenericTypes.php
index 25c00a232..10dea70a0 100644
--- a/tests/Functional/Entity/GenericTypes.php
+++ b/tests/Functional/Entity/GenericTypes.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/JMSIgnoredProperty.php b/tests/Functional/Entity/JMSIgnoredProperty.php
index 03fff3bb6..40fac5122 100644
--- a/tests/Functional/Entity/JMSIgnoredProperty.php
+++ b/tests/Functional/Entity/JMSIgnoredProperty.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/JMSUser.php b/tests/Functional/Entity/JMSUser.php
index 0e3a9af43..37e8e4b4d 100644
--- a/tests/Functional/Entity/JMSUser.php
+++ b/tests/Functional/Entity/JMSUser.php
@@ -160,15 +160,15 @@ class JMSUser
     #[Serializer\Expose]
     private $notes;
 
-    public function setRoles($roles)
+    public function setRoles($roles): void
     {
     }
 
-    public function getRoles()
+    public function getRoles(): void
     {
     }
 
-    public function setDummy(Dummy $dummy)
+    public function setDummy(Dummy $dummy): void
     {
     }
 }
diff --git a/tests/Functional/Entity/PrivateProtectedExposure.php b/tests/Functional/Entity/PrivateProtectedExposure.php
index f0b30fbde..c138f7f89 100644
--- a/tests/Functional/Entity/PrivateProtectedExposure.php
+++ b/tests/Functional/Entity/PrivateProtectedExposure.php
@@ -24,7 +24,7 @@ class PrivateProtectedExposure
      */
     public $publicField;
 
-    protected function setProtected(string $thing)
+    protected function setProtected(string $thing): void
     {
     }
 }
diff --git a/tests/Functional/Entity/QueryModel/ArrayQueryModel.php b/tests/Functional/Entity/QueryModel/ArrayQueryModel.php
index 5fcdffdd4..ee7a22f45 100644
--- a/tests/Functional/Entity/QueryModel/ArrayQueryModel.php
+++ b/tests/Functional/Entity/QueryModel/ArrayQueryModel.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/QueryModel/FilterQueryModel.php b/tests/Functional/Entity/QueryModel/FilterQueryModel.php
index 8743937f5..748b49b35 100644
--- a/tests/Functional/Entity/QueryModel/FilterQueryModel.php
+++ b/tests/Functional/Entity/QueryModel/FilterQueryModel.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/QueryModel/PaginationQueryModel.php b/tests/Functional/Entity/QueryModel/PaginationQueryModel.php
index acb765246..5049858a2 100644
--- a/tests/Functional/Entity/QueryModel/PaginationQueryModel.php
+++ b/tests/Functional/Entity/QueryModel/PaginationQueryModel.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/QueryModel/SortEnum.php b/tests/Functional/Entity/QueryModel/SortEnum.php
index 3b5212126..9b249b1a3 100644
--- a/tests/Functional/Entity/QueryModel/SortEnum.php
+++ b/tests/Functional/Entity/QueryModel/SortEnum.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/QueryModel/SortQueryModel.php b/tests/Functional/Entity/QueryModel/SortQueryModel.php
index 1b0ff9790..313da1c09 100644
--- a/tests/Functional/Entity/QueryModel/SortQueryModel.php
+++ b/tests/Functional/Entity/QueryModel/SortQueryModel.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/RangeInteger.php b/tests/Functional/Entity/RangeInteger.php
index a3c4b1527..dd896ca50 100644
--- a/tests/Functional/Entity/RangeInteger.php
+++ b/tests/Functional/Entity/RangeInteger.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/SymfonyMapQueryString.php b/tests/Functional/Entity/SymfonyMapQueryString.php
index dd4d74936..e4a655ace 100644
--- a/tests/Functional/Entity/SymfonyMapQueryString.php
+++ b/tests/Functional/Entity/SymfonyMapQueryString.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/Functional/Entity/User.php b/tests/Functional/Entity/User.php
index ee08260bf..438c10b7e 100644
--- a/tests/Functional/Entity/User.php
+++ b/tests/Functional/Entity/User.php
@@ -109,7 +109,7 @@ public function setRoles(array $roles): void
         $this->roles = $roles;
     }
 
-    public function setLocation(string $location)
+    public function setLocation(string $location): void
     {
     }
 
@@ -118,27 +118,27 @@ public function setFriendsNumber(int $friendsNumber): void
         $this->friendsNumber = $friendsNumber;
     }
 
-    public function setCreatedAt(\DateTime $createAt)
+    public function setCreatedAt(\DateTime $createAt): void
     {
     }
 
-    public function setUsers(array $users)
+    public function setUsers(array $users): void
     {
     }
 
-    public function setFriend(?self $friend = null)
+    public function setFriend(?self $friend = null): void
     {
     }
 
-    public function setFriends(array $friends = [])
+    public function setFriends(array $friends = []): void
     {
     }
 
-    public function setDummy(Dummy $dummy)
+    public function setDummy(Dummy $dummy): void
     {
     }
 
-    public function setStatus(string $status)
+    public function setStatus(string $status): void
     {
     }
 
diff --git a/tests/Functional/EntityExcluded/Symfony7/SerializedNameEntity.php b/tests/Functional/EntityExcluded/Symfony7/SerializedNameEntity.php
index 5d947a391..80f53f4f0 100644
--- a/tests/Functional/EntityExcluded/Symfony7/SerializedNameEntity.php
+++ b/tests/Functional/EntityExcluded/Symfony7/SerializedNameEntity.php
@@ -28,7 +28,7 @@ class SerializedNameEntity
      * Tests serialized name feature.
      */
     #[SerializedName('notwhatyouthink')]
-    public function setBar(string $bar)
+    public function setBar(string $bar): void
     {
     }
 }
diff --git a/tests/Functional/ModelDescriber/NameConverter.php b/tests/Functional/ModelDescriber/NameConverter.php
index 9807bfa8f..41520203b 100644
--- a/tests/Functional/ModelDescriber/NameConverter.php
+++ b/tests/Functional/ModelDescriber/NameConverter.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/ModelDescriber/Annotations/Fixture/CompoundStub.php b/tests/ModelDescriber/Annotations/Fixture/CompoundStub.php
index 0feb2f24e..12b7139c8 100644
--- a/tests/ModelDescriber/Annotations/Fixture/CompoundStub.php
+++ b/tests/ModelDescriber/Annotations/Fixture/CompoundStub.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/ModelDescriber/Annotations/Fixture/CompoundValidationRule.php b/tests/ModelDescriber/Annotations/Fixture/CompoundValidationRule.php
index 6fd8fe31a..8f8f4eb57 100644
--- a/tests/ModelDescriber/Annotations/Fixture/CompoundValidationRule.php
+++ b/tests/ModelDescriber/Annotations/Fixture/CompoundValidationRule.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriberTest.php b/tests/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriberTest.php
index caacce7d2..cd023dccc 100644
--- a/tests/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriberTest.php
+++ b/tests/RouteDescriber/RouteArgumentDescriber/SymfonyMapRequestPayloadDescriberTest.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *
diff --git a/tests/RouteDescriber/RouteArgumentDescriber/fixture/SomeObject.php b/tests/RouteDescriber/RouteArgumentDescriber/fixture/SomeObject.php
index 3a4f256fe..8960ca68d 100644
--- a/tests/RouteDescriber/RouteArgumentDescriber/fixture/SomeObject.php
+++ b/tests/RouteDescriber/RouteArgumentDescriber/fixture/SomeObject.php
@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 /*
  * This file is part of the NelmioApiDocBundle package.
  *