diff --git a/README.md b/README.md
index ccf544b..761addf 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,8 @@ Version < 1.2 requires zircote/swagger-php 2.x which works with the OpenAPI Spec
 So tobion/openapi-symfony-routing can be used with both OpenAPI v2 and v3 and composer will select the compatible one for your dependencies.
 Route loading stays the same between those versions. You just need to update the annotations when migrating from OpenAPI v2 to v3.
 
+Version >= 1.3 requires zircote/swagger-php >=4.1 which is compatible with the OpenAPI Specification version 3.0.1 and supports attributes. This package need php >= 8.1 for attributes support from zircote/swagger-php.
+
 ## Basic Usage
 
 This library allows to (re-)use your OpenAPI documentation to configure the routing of your Symfony-based API.
diff --git a/add_composer.sh b/add_composer.sh
new file mode 100644
index 0000000..3dc47eb
--- /dev/null
+++ b/add_composer.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+export COMPOSER_HOME=/tmp/composer
+
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+php -r "if (hash_file('sha384', 'composer-setup.php') === '906a84df04cea2aa72f40b5f787e49f22d4c2f19492ac310e8cba5b96ac8b64115ac402c8cd292b8a03482574915d1a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+php composer-setup.php
+php -r "unlink('composer-setup.php');"
+chmod +x composer.phar
+mv composer.phar composer
diff --git a/composer.json b/composer.json
index 7d211ef..0fcaf40 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "symfony/finder": "^4.4|^5.0|^6.0",
         "symfony/framework-bundle": "^4.4|^5.0|^6.0",
         "symfony/routing": "^4.4|^5.0|^6.0",
-        "zircote/swagger-php": "^3.0.3"
+        "zircote/swagger-php": "^3.0.3|^4.1"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^5.2|^6.0"
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..e65ec00
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,20 @@
+services:
+    php7:
+        image: php:7.2-fpm
+        user: "1000:1000"
+        working_dir: /var/www/html
+        volumes:
+            - ./:/var/www/html
+    php8.0:
+        image: php:8.0-fpm
+        user: "1000:1000"
+        working_dir: /var/www/html
+        volumes:
+            - ./:/var/www/html
+    php8.1:
+        image: php:8.1-fpm
+        working_dir: /var/www/html
+        user: "1000:1000"
+        volumes:
+            - ./:/var/www/html
+
diff --git a/src/OpenApiRouteLoader.php b/src/OpenApiRouteLoader.php
index ad6deb4..67622c4 100644
--- a/src/OpenApiRouteLoader.php
+++ b/src/OpenApiRouteLoader.php
@@ -27,6 +27,11 @@ class OpenApiRouteLoader implements RouteLoaderInterface
      */
     private $routeNames = [];
 
+    /**
+     * @var null|Generator
+     */
+    private $generator = null;
+
     /**
      * @var string
      */
@@ -86,12 +91,30 @@ private function createOpenApi(): OpenApi
            return \OpenApi\scan($this->finder);
         }
 
-        $processors = array_filter(Analysis::processors(), static function ($processor): bool {
-            // remove OperationId processor which would hash the controller starting in 3.2.2 breaking the default route name logic
-            return !$processor instanceof OperationId && !$processor instanceof DocBlockDescriptions;
-        });
+        if (null !== $this->generator) {
+            return $this->generator->generate($this->finder);
+        }
+
+        if (method_exists(Analysis::class, 'processors')) {
+            $processors = array_filter(Analysis::processors(), static function ($processor): bool {
+                // remove OperationId processor which would hash the controller starting in 3.2.2 breaking the default route name logic
+                return !$processor instanceof OperationId && !$processor instanceof DocBlockDescriptions;
+            });
+
+            $this->generator = (new Generator())->setProcessors($this->filterProcessors($processors));
+
+            return $this->generator->generate($this->finder);
+        }
+
+        $this->generator = new Generator();
 
-        return (new Generator())->setProcessors($processors)->generate($this->finder);
+        $this->generator->setProcessors(
+            $this->filterProcessors(
+                $this->generator->getProcessors()
+            )
+        );
+
+        return $this->generator->generate($this->finder);
     }
 
     /**
@@ -128,8 +151,14 @@ private function createRoute(Operation $operation, string $controller, FormatSuf
         }
         if (self::$openApiUndefined !== $operation->parameters) {
             foreach ($operation->parameters as $parameter) {
-                if ('path' === $parameter->in && self::$openApiUndefined !== $parameter->schema && self::$openApiUndefined !== $parameter->schema->pattern) {
-                    $route->setRequirement($parameter->name, $parameter->schema->pattern);
+                if ('path' === $parameter->in && self::$openApiUndefined !== $parameter->schema) {
+                    if (self::$openApiUndefined !== $parameter->schema->pattern) {
+                        $route->setRequirement($parameter->name, $parameter->schema->pattern);
+                    }
+
+                    if (self::$openApiUndefined !== $parameter->schema->enum) {
+                        $route->setRequirement($parameter->name, implode('|', $parameter->schema->enum));
+                    }
                 }
             }
         }
@@ -190,4 +219,11 @@ private function getDefaultRouteName(string $controller): string
 
         return $name;
     }
+
+    private function filterProcessors(array $processors): array
+    {
+        return array_filter($processors, static function ($processor): bool {
+            return !$processor instanceof OperationId && !$processor instanceof DocBlockDescriptions;
+        });
+    }
 }
diff --git a/tests/Fixtures/Basic/Controller.php b/tests/Annotations/Fixtures/Basic/Controller.php
similarity index 82%
rename from tests/Fixtures/Basic/Controller.php
rename to tests/Annotations/Fixtures/Basic/Controller.php
index bb8aa6b..c9bbdb7 100644
--- a/tests/Fixtures/Basic/Controller.php
+++ b/tests/Annotations/Fixtures/Basic/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\Basic;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\Basic;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/FormatSuffix/Controller.php b/tests/Annotations/Fixtures/FormatSuffix/Controller.php
similarity index 92%
rename from tests/Fixtures/FormatSuffix/Controller.php
rename to tests/Annotations/Fixtures/FormatSuffix/Controller.php
index d08b11a..776dd8e 100644
--- a/tests/Fixtures/FormatSuffix/Controller.php
+++ b/tests/Annotations/Fixtures/FormatSuffix/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\FormatSuffix;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\FormatSuffix;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/OperationId/Controller.php b/tests/Annotations/Fixtures/OperationId/Controller.php
similarity index 82%
rename from tests/Fixtures/OperationId/Controller.php
rename to tests/Annotations/Fixtures/OperationId/Controller.php
index 3784059..be63143 100644
--- a/tests/Fixtures/OperationId/Controller.php
+++ b/tests/Annotations/Fixtures/OperationId/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\OperationId;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\OperationId;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/PathParameterPattern/Controller.php b/tests/Annotations/Fixtures/PathParameterPattern/Controller.php
similarity index 93%
rename from tests/Fixtures/PathParameterPattern/Controller.php
rename to tests/Annotations/Fixtures/PathParameterPattern/Controller.php
index 101bcc3..c175881 100644
--- a/tests/Fixtures/PathParameterPattern/Controller.php
+++ b/tests/Annotations/Fixtures/PathParameterPattern/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\PathParameterPattern;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\PathParameterPattern;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/Priority/Controller.php b/tests/Annotations/Fixtures/Priority/Controller.php
similarity index 90%
rename from tests/Fixtures/Priority/Controller.php
rename to tests/Annotations/Fixtures/Priority/Controller.php
index 9876c69..e93790a 100644
--- a/tests/Fixtures/Priority/Controller.php
+++ b/tests/Annotations/Fixtures/Priority/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\Priority;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\Priority;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/SeveralClasses/BarController.php b/tests/Annotations/Fixtures/SeveralClasses/BarController.php
similarity index 80%
rename from tests/Fixtures/SeveralClasses/BarController.php
rename to tests/Annotations/Fixtures/SeveralClasses/BarController.php
index cfc7b25..e8c0e14 100644
--- a/tests/Fixtures/SeveralClasses/BarController.php
+++ b/tests/Annotations/Fixtures/SeveralClasses/BarController.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/SeveralClasses/FooController.php b/tests/Annotations/Fixtures/SeveralClasses/FooController.php
similarity index 76%
rename from tests/Fixtures/SeveralClasses/FooController.php
rename to tests/Annotations/Fixtures/SeveralClasses/FooController.php
index 1759110..71b915a 100644
--- a/tests/Fixtures/SeveralClasses/FooController.php
+++ b/tests/Annotations/Fixtures/SeveralClasses/FooController.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/SeveralClasses/SubNamespace/SubController.php b/tests/Annotations/Fixtures/SeveralClasses/SubNamespace/SubController.php
similarity index 73%
rename from tests/Fixtures/SeveralClasses/SubNamespace/SubController.php
rename to tests/Annotations/Fixtures/SeveralClasses/SubNamespace/SubController.php
index cea9f38..22d835a 100644
--- a/tests/Fixtures/SeveralClasses/SubNamespace/SubController.php
+++ b/tests/Annotations/Fixtures/SeveralClasses/SubNamespace/SubController.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses\SubNamespace;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses\SubNamespace;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/SeveralHttpMethods/Controller.php b/tests/Annotations/Fixtures/SeveralHttpMethods/Controller.php
similarity index 91%
rename from tests/Fixtures/SeveralHttpMethods/Controller.php
rename to tests/Annotations/Fixtures/SeveralHttpMethods/Controller.php
index 16cb272..0f73f35 100644
--- a/tests/Fixtures/SeveralHttpMethods/Controller.php
+++ b/tests/Annotations/Fixtures/SeveralHttpMethods/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralHttpMethods;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralHttpMethods;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/Fixtures/SeveralRoutesOnOneAction/Controller.php b/tests/Annotations/Fixtures/SeveralRoutesOnOneAction/Controller.php
similarity index 87%
rename from tests/Fixtures/SeveralRoutesOnOneAction/Controller.php
rename to tests/Annotations/Fixtures/SeveralRoutesOnOneAction/Controller.php
index 6c34762..6749df2 100644
--- a/tests/Fixtures/SeveralRoutesOnOneAction/Controller.php
+++ b/tests/Annotations/Fixtures/SeveralRoutesOnOneAction/Controller.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralRoutesOnOneAction;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralRoutesOnOneAction;
 
 use OpenApi\Annotations as OA;
 
diff --git a/tests/OpenApiRouteLoaderTest.php b/tests/Annotations/OpenApiRouteLoaderAnnotationsTest.php
similarity index 88%
rename from tests/OpenApiRouteLoaderTest.php
rename to tests/Annotations/OpenApiRouteLoaderAnnotationsTest.php
index 2003010..59e2ac1 100644
--- a/tests/OpenApiRouteLoaderTest.php
+++ b/tests/Annotations/OpenApiRouteLoaderAnnotationsTest.php
@@ -2,27 +2,27 @@
 
 declare(strict_types=1);
 
-namespace Tobion\OpenApiSymfonyRouting\Tests;
+namespace Tobion\OpenApiSymfonyRouting\Tests\Annotations;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Finder\Exception\DirectoryNotFoundException;
 use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Tobion\OpenApiSymfonyRouting\OpenApiRouteLoader;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\Basic\Controller as BasicController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\FormatSuffix\Controller as FormatSuffixController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\OperationId\Controller as OperationIdController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\PathParameterPattern\Controller as PathParameterPatternController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\Priority\Controller as PriorityController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses\BarController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses\FooController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralClasses\SubNamespace\SubController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralHttpMethods\Controller as SeveralHttpMethodsController;
-use Tobion\OpenApiSymfonyRouting\Tests\Fixtures\SeveralRoutesOnOneAction\Controller as SeveralRoutesOnOneActionController;
-
-class OpenApiRouteLoaderTest extends TestCase
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\Basic\Controller as BasicController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\FormatSuffix\Controller as FormatSuffixController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\OperationId\Controller as OperationIdController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\PathParameterPattern\Controller as PathParameterPatternController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\Priority\Controller as PriorityController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses\BarController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses\FooController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralClasses\SubNamespace\SubController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralHttpMethods\Controller as SeveralHttpMethodsController;
+use Tobion\OpenApiSymfonyRouting\Tests\Annotations\Fixtures\SeveralRoutesOnOneAction\Controller as SeveralRoutesOnOneActionController;
+
+final class OpenApiRouteLoaderAnnotationsTest extends TestCase
 {
-    private const FIXTURES_ROUTE_NAME_PREFIX = 'tobion_openapisymfonyrouting_tests_fixtures_';
+    private const FIXTURES_ROUTE_NAME_PREFIX = 'tobion_openapisymfonyrouting_tests_annotations_fixtures_';
 
     public function testBasic(): void
     {
diff --git a/tests/Attributes/Fixtures/Basic/Controller.php b/tests/Attributes/Fixtures/Basic/Controller.php
new file mode 100644
index 0000000..c72d368
--- /dev/null
+++ b/tests/Attributes/Fixtures/Basic/Controller.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\Basic;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(version: "1.0", title: "My API")]
+class Controller
+{
+    #[OA\Get(path: "/foobar")]
+    #[OA\Response(response: 200, description: "OK")]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/FormatSuffix/Controller.php b/tests/Attributes/Fixtures/FormatSuffix/Controller.php
new file mode 100644
index 0000000..4cd547d
--- /dev/null
+++ b/tests/Attributes/Fixtures/FormatSuffix/Controller.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\FormatSuffix;
+
+use OpenApi\Attributes as OA;
+
+#[OA\OpenApi(
+    info: new OA\Info(
+        title: "My API",
+        version: "1.0"
+    ),
+    x: [
+        "format-suffix" => [
+            "enabled" => true
+        ]
+    ]
+)]
+class Controller
+{
+    #[OA\Get(path: "/a",)]
+    #[OA\Response(response: "200", description: "Success")]
+    public function inheritEnabledFormatSuffix(): void
+    {
+    }
+
+    #[OA\Get(path: "/b", x: ["format-suffix" => ["pattern" => "json|xml"]])]
+    #[OA\Response(response: "200", description: "Success")]
+    public function defineFormatPattern(): void
+    {
+    }
+
+    #[OA\Get(path: "/c", x: ["format-suffix" => false])]
+    #[OA\Response(response: "200", description: "Success")]
+    public function disableFormatSuffix(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/OperationId/Controller.php b/tests/Attributes/Fixtures/OperationId/Controller.php
new file mode 100644
index 0000000..8fc22ea
--- /dev/null
+++ b/tests/Attributes/Fixtures/OperationId/Controller.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\OperationId;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title: "My API", version: "1.0")]
+class Controller
+{
+    #[OA\Get(path: "/foobar", operationId: "my-name")]
+    #[OA\Response(response: "200", description: "Success")]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/PathParameterPattern/Controller.php b/tests/Attributes/Fixtures/PathParameterPattern/Controller.php
new file mode 100644
index 0000000..8d74212
--- /dev/null
+++ b/tests/Attributes/Fixtures/PathParameterPattern/Controller.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\PathParameterPattern;
+
+use mysql_xdevapi\Schema;
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title: "My API", version: "1.0")]
+class Controller
+{
+    #[OA\Get(path: "/foo/{id}")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function noPattern(
+        #[OA\Parameter]string $id
+    ): void
+    {
+    }
+
+    #[OA\Get(path: "/baz/{id}")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function noSchema(
+        #[OA\Parameter]string $id
+    ): void
+    {
+    }
+
+    #[OA\Get(path: "/bar/{id}/{type}")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function withPattern(
+        #[OA\PathParameter(required: true, schema: new OA\Schema(pattern:"^[a-zA-Z0-9]+$"))]
+        string $id,
+        #[OA\PathParameter(required: true, schema: new OA\Schema(enum: ["internal", "external"]))]
+        string $type
+    ): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/Priority/Controller.php b/tests/Attributes/Fixtures/Priority/Controller.php
new file mode 100644
index 0000000..8e7d0b6
--- /dev/null
+++ b/tests/Attributes/Fixtures/Priority/Controller.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\Priority;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title:"My API", version:"1.0")]
+class Controller
+{
+    #[OA\Get(path:"/foo")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function foo(): void
+    {
+    }
+
+    #[OA\Get(path:"/{catchall}", x: ["priority" => -100])]
+    #[OA\Response(response:"200", description:"Success")]
+    public function catchall(): void
+    {
+    }
+
+    #[OA\Get(path:"/bar", x: ["priority" => 10])]
+    #[OA\Response(response:"200", description:"Success")]
+    public function bar(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/SeveralClasses/BarController.php b/tests/Attributes/Fixtures/SeveralClasses/BarController.php
new file mode 100644
index 0000000..b4f81bd
--- /dev/null
+++ b/tests/Attributes/Fixtures/SeveralClasses/BarController.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title:"My API", version:"1.0")]
+class BarController
+{
+    #[OA\Get(path:"/bar")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/SeveralClasses/FooController.php b/tests/Attributes/Fixtures/SeveralClasses/FooController.php
new file mode 100644
index 0000000..071433a
--- /dev/null
+++ b/tests/Attributes/Fixtures/SeveralClasses/FooController.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses;
+
+use OpenApi\Attributes as OA;
+
+class FooController
+{
+    #[OA\Get(path:"/foo")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/SeveralClasses/SubNamespace/SubController.php b/tests/Attributes/Fixtures/SeveralClasses/SubNamespace/SubController.php
new file mode 100644
index 0000000..2f59c32
--- /dev/null
+++ b/tests/Attributes/Fixtures/SeveralClasses/SubNamespace/SubController.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses\SubNamespace;
+
+use OpenApi\Attributes as OA;
+
+class SubController
+{
+    #[OA\Get(path:"/sub")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/SeveralHttpMethods/Controller.php b/tests/Attributes/Fixtures/SeveralHttpMethods/Controller.php
new file mode 100644
index 0000000..4db068d
--- /dev/null
+++ b/tests/Attributes/Fixtures/SeveralHttpMethods/Controller.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralHttpMethods;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title:"My API", version:"1.0")]
+class Controller
+{
+    #[OA\Get(path:"/foobar")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function get(): void
+    {
+    }
+
+    #[OA\Put(path:"/foobar")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function put(): void
+    {
+    }
+
+    #[OA\Post(path:"/foobar")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function post(): void
+    {
+    }
+
+    #[OA\Delete(path:"/foobar")]
+    #[OA\Response(response:"200", description:"Success")]
+    public function delete(): void
+    {
+    }
+}
diff --git a/tests/Attributes/Fixtures/SeveralRoutesOnOneAction/Controller.php b/tests/Attributes/Fixtures/SeveralRoutesOnOneAction/Controller.php
new file mode 100644
index 0000000..e098dae
--- /dev/null
+++ b/tests/Attributes/Fixtures/SeveralRoutesOnOneAction/Controller.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralRoutesOnOneAction;
+
+use OpenApi\Attributes as OA;
+
+#[OA\Info(title:"My API", version:"1.0")]
+class Controller
+{
+    #[OA\Get(path:"/foobar", responses: [new OA\Response(response:"200", description:"Success")])]
+    #[OA\Post(path:"/foobar", responses: [new OA\Response(response:"200", description:"Success")])]
+    #[OA\Get(path:"/foo-bar", operationId: "my-name", responses: [new OA\Response(response:"200", description:"Success")])]
+    public function __invoke(): void
+    {
+    }
+}
diff --git a/tests/Attributes/OpenApiRouteLoaderAttributesTest.php b/tests/Attributes/OpenApiRouteLoaderAttributesTest.php
new file mode 100644
index 0000000..d79ab2e
--- /dev/null
+++ b/tests/Attributes/OpenApiRouteLoaderAttributesTest.php
@@ -0,0 +1,235 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tobion\OpenApiSymfonyRouting\Tests\Attributes;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Finder\Exception\DirectoryNotFoundException;
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCollection;
+use Tobion\OpenApiSymfonyRouting\OpenApiRouteLoader;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\Basic\Controller as BasicController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\FormatSuffix\Controller as FormatSuffixController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\OperationId\Controller as OperationIdController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\PathParameterPattern\Controller as PathParameterPatternController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\Priority\Controller as PriorityController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses\BarController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses\FooController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralClasses\SubNamespace\SubController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralHttpMethods\Controller as SeveralHttpMethodsController;
+use Tobion\OpenApiSymfonyRouting\Tests\Attributes\Fixtures\SeveralRoutesOnOneAction\Controller as SeveralRoutesOnOneActionController;
+
+/**
+ * @requires PHP >= 8.1
+ */
+final class OpenApiRouteLoaderAttributesTest extends TestCase
+{
+    private const FIXTURES_ROUTE_NAME_PREFIX = 'tobion_openapisymfonyrouting_tests_attributes_fixtures_';
+
+    public function testBasic(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/Basic');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'basic__invoke',
+            (new Route('/foobar'))->setMethods('GET')->setDefault('_controller', BasicController::class.'::__invoke')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testFormatSuffix(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/FormatSuffix');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'formatsuffix_inheritenabledformatsuffix',
+            (new Route('/a.{_format}'))->setDefault('_format', null)->setMethods('GET')->setDefault('_controller', FormatSuffixController::class.'::inheritEnabledFormatSuffix')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'formatsuffix_defineformatpattern',
+            (new Route('/b.{_format}'))->setDefault('_format', null)->setRequirement('_format', 'json|xml')->setMethods('GET')->setDefault('_controller', FormatSuffixController::class.'::defineFormatPattern')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'formatsuffix_disableformatsuffix',
+            (new Route('/c'))->setMethods('GET')->setDefault('_controller', FormatSuffixController::class.'::disableFormatSuffix')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testOperationId(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/OperationId');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            'my-name',
+            (new Route('/foobar'))->setMethods('GET')->setDefault('_controller', OperationIdController::class.'::__invoke')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testPathParameterPattern(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/PathParameterPattern');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'pathparameterpattern_nopattern',
+            (new Route('/foo/{id}'))->setMethods('GET')->setDefault('_controller', PathParameterPatternController::class.'::noPattern')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'pathparameterpattern_noschema',
+            (new Route('/baz/{id}'))->setMethods('GET')->setDefault('_controller', PathParameterPatternController::class.'::noSchema')
+        );
+
+        // OpenAPI needs the param pattern to be anchored (^$) to have the desired effect. Symfony automatically trims those to get a valid full path regex.
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'pathparameterpattern_withpattern',
+            (new Route('/bar/{id}/{type}'))
+                ->setRequirement('id', '^[a-zA-Z0-9]+$')
+                ->setRequirement('type', 'internal|external')
+                ->setMethods('GET')->setDefault('_controller', PathParameterPatternController::class.'::withPattern')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testPriority(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/Priority');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'priority_foo',
+            (new Route('/foo'))->setMethods('GET')->setDefault('_controller', PriorityController::class.'::foo')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'priority_catchall',
+            (new Route('/{catchall}'))->setMethods('GET')->setDefault('_controller', PriorityController::class.'::catchall'),
+            -100
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'priority_bar',
+            (new Route('/bar'))->setMethods('GET')->setDefault('_controller', PriorityController::class.'::bar'),
+            10
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testSeveralClasses(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/SeveralClasses');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalclasses_bar__invoke',
+            (new Route('/bar'))->setMethods('GET')->setDefault('_controller', BarController::class.'::__invoke')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalclasses_foo__invoke',
+            (new Route('/foo'))->setMethods('GET')->setDefault('_controller', FooController::class.'::__invoke')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalclasses_subnamespace_sub__invoke',
+            (new Route('/sub'))->setMethods('GET')->setDefault('_controller', SubController::class.'::__invoke')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testSeveralHttpMethods(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/SeveralHttpMethods');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalhttpmethods_get',
+            (new Route('/foobar'))->setMethods('GET')->setDefault('_controller', SeveralHttpMethodsController::class.'::get')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalhttpmethods_put',
+            (new Route('/foobar'))->setMethods('PUT')->setDefault('_controller', SeveralHttpMethodsController::class.'::put')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalhttpmethods_post',
+            (new Route('/foobar'))->setMethods('POST')->setDefault('_controller', SeveralHttpMethodsController::class.'::post')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalhttpmethods_delete',
+            (new Route('/foobar'))->setMethods('DELETE')->setDefault('_controller', SeveralHttpMethodsController::class.'::delete')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testSeveralRoutesOnOneAction(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/SeveralRoutesOnOneAction');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalroutesononeaction__invoke',
+            (new Route('/foobar'))->setMethods('GET')->setDefault('_controller', SeveralRoutesOnOneActionController::class.'::__invoke')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalroutesononeaction__invoke_1',
+            (new Route('/foobar'))->setMethods('POST')->setDefault('_controller', SeveralRoutesOnOneActionController::class.'::__invoke')
+        );
+        $expectedRoutes->add(
+            'my-name',
+            (new Route('/foo-bar'))->setMethods('GET')->setDefault('_controller', SeveralRoutesOnOneActionController::class.'::__invoke')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testSeveralDirectories(): void
+    {
+        $routeLoader = OpenApiRouteLoader::fromDirectories(__DIR__.'/Fixtures/Basic', __DIR__.'/Fixtures/SeveralClasses/SubNamespace');
+
+        $routes = $routeLoader->__invoke();
+
+        $expectedRoutes = new RouteCollection();
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'basic__invoke',
+            (new Route('/foobar'))->setMethods('GET')->setDefault('_controller', BasicController::class.'::__invoke')
+        );
+        $expectedRoutes->add(
+            self::FIXTURES_ROUTE_NAME_PREFIX.'severalclasses_subnamespace_sub__invoke',
+            (new Route('/sub'))->setMethods('GET')->setDefault('_controller', SubController::class.'::__invoke')
+        );
+
+        self::assertEquals($expectedRoutes, $routes);
+    }
+
+    public function testSrcDirectoryDoesNotExist(): void
+    {
+        self::expectException(DirectoryNotFoundException::class);
+        self::expectExceptionMessage('/../../../../src" directory does not exist');
+
+        OpenApiRouteLoader::fromSrcDirectory();
+    }
+}