diff --git a/composer.json b/composer.json
index db3247e..d949bf7 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     "prefer-stable": true,
     "scripts": {
         "cs": "php-cs-fixer fix --allow-risky=yes",
-        "rector": "rector process src test",
+        "rector": "rector process src tests",
         "lint": [
             "@cs --dry-run",
             "@rector --dry-run"
diff --git a/rector.php b/rector.php
index a5a5306..cf258a1 100644
--- a/rector.php
+++ b/rector.php
@@ -9,4 +9,4 @@
         TypedPropertyFromStrictConstructorRector::class
     ])
     ->withPreparedSets(true, true)
-    ->withPhpVersion(PhpVersion::PHP_74);
+    ->withPhpVersion(PhpVersion::PHP_81);
diff --git a/tests/Concerns/Fixtures.php b/tests/Concerns/Fixtures.php
index 9a838b7..b9800de 100644
--- a/tests/Concerns/Fixtures.php
+++ b/tests/Concerns/Fixtures.php
@@ -9,15 +9,11 @@ trait Fixtures
     public function getFixtureFinder(): Finder
     {
         $controllersDir = __DIR__ . '/../Fixtures/Controllers';
-        $finder = (new Finder())
+
+        return (new Finder())
             ->files()
             ->followLinks()
             ->name('*.php')
             ->in($controllersDir);
-        if (\PHP_VERSION_ID < 80100) {
-            $finder->notName('AttributeController.php');
-        }
-
-        return $finder;
     }
 }
diff --git a/tests/Fixtures/Controllers/AttributeController.php b/tests/Fixtures/Controllers/AttributeController.php
index 36c8125..a72f491 100644
--- a/tests/Fixtures/Controllers/AttributeController.php
+++ b/tests/Fixtures/Controllers/AttributeController.php
@@ -7,18 +7,16 @@
 use Radebatz\OpenApi\Routing\Tests\Fixtures\Middleware\BarMiddleware;
 use Radebatz\OpenApi\Routing\Tests\Fixtures\Middleware\FooMiddleware;
 
-if (\PHP_VERSION_ID >= 80100) {
-    #[OAX\Controller(prefix: '/attributes')]
-    #[OAT\Response(response: 403, description: 'Not allowed')]
-    #[OAX\Middleware([FooMiddleware::class])]
-    class AttributeController
+#[OAX\Controller(prefix: '/attributes')]
+#[OAT\Response(response: 403, description: 'Not allowed')]
+#[OAX\Middleware([FooMiddleware::class])]
+class AttributeController
+{
+    #[OAT\Get(path: '/prefixed', x: ['name' => 'attributes'])]
+    #[OAT\Response(response: 200, description: 'All good')]
+    #[OAX\Middleware([BarMiddleware::class])]
+    public function prefixed()
     {
-        #[OAT\Get(path: '/prefixed', x: ['name' => 'attributes'])]
-        #[OAT\Response(response: 200, description: 'All good')]
-        #[OAX\Middleware([BarMiddleware::class])]
-        public function prefixed()
-        {
-            return FakeResponse::create('Get fooya');
-        }
+        return FakeResponse::create('Get fooya');
     }
 }
diff --git a/tests/Laravel/CachingTest.php b/tests/Laravel/CachingTest.php
index 883071f..5bdfc65 100644
--- a/tests/Laravel/CachingTest.php
+++ b/tests/Laravel/CachingTest.php
@@ -43,7 +43,7 @@ public function testReload(?CacheInterface $cache, $reload, $openapisCached)
         $router = $app['router'];
         $this->assertNotNull($router->getRoutes()->getByName('getya'));
 
-        $this->assertEquals($openapisCached, $cache ? $cache->has(OpenApiRouter::CACHE_KEY_OPENAPI) : false);
+        $this->assertEquals($openapisCached, $cache && $cache->has(OpenApiRouter::CACHE_KEY_OPENAPI));
     }
 
     protected function getApp(): Application
diff --git a/tests/Laravel/CallsApplicationTrait.php b/tests/Laravel/CallsApplicationTrait.php
index 94780a7..d81f055 100644
--- a/tests/Laravel/CallsApplicationTrait.php
+++ b/tests/Laravel/CallsApplicationTrait.php
@@ -14,7 +14,7 @@ trait CallsApplicationTrait
 {
     use Fixtures;
 
-    protected $app = null;
+    protected $app;
 
     protected function setUp(): void
     {
diff --git a/tests/Lumen/LumenTest.php b/tests/Lumen/LumenTest.php
index 18e2bc8..0f32731 100644
--- a/tests/Lumen/LumenTest.php
+++ b/tests/Lumen/LumenTest.php
@@ -4,6 +4,8 @@
 
 class LumenTest extends LumenTestCase
 {
+    public $response;
+
     use CallsApplicationTrait;
 
     /** @test */
diff --git a/tests/Lumen/ParametersTest.php b/tests/Lumen/ParametersTest.php
index 25121b4..c1ea2b3 100644
--- a/tests/Lumen/ParametersTest.php
+++ b/tests/Lumen/ParametersTest.php
@@ -4,6 +4,7 @@
 
 class ParametersTest extends LumenTestCase
 {
+    public $response;
     use CallsApplicationTrait;
 
     /** @test */
diff --git a/tests/Slim4/CallsControllerTrait.php b/tests/Slim/CallsControllerTrait.php
similarity index 96%
rename from tests/Slim4/CallsControllerTrait.php
rename to tests/Slim/CallsControllerTrait.php
index a84c725..1dca745 100644
--- a/tests/Slim4/CallsControllerTrait.php
+++ b/tests/Slim/CallsControllerTrait.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-namespace Radebatz\OpenApi\Routing\Tests\Slim4;
+namespace Radebatz\OpenApi\Routing\Tests\Slim;
 
 use Nyholm\Psr7\Factory\Psr17Factory;
 use Psr\Http\Message\ResponseInterface;
diff --git a/tests/Slim4/ParametersTest.php b/tests/Slim/ParametersTest.php
similarity index 96%
rename from tests/Slim4/ParametersTest.php
rename to tests/Slim/ParametersTest.php
index b6de927..d4fb229 100644
--- a/tests/Slim4/ParametersTest.php
+++ b/tests/Slim/ParametersTest.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-namespace Radebatz\OpenApi\Routing\Tests\Slim4;
+namespace Radebatz\OpenApi\Routing\Tests\Slim;
 
 use PHPUnit\Framework\TestCase;
 
diff --git a/tests/Slim4/SlimTest.php b/tests/Slim/SlimTest.php
similarity index 96%
rename from tests/Slim4/SlimTest.php
rename to tests/Slim/SlimTest.php
index 3e6054b..55069f0 100644
--- a/tests/Slim4/SlimTest.php
+++ b/tests/Slim/SlimTest.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 
-namespace Radebatz\OpenApi\Routing\Tests\Slim4;
+namespace Radebatz\OpenApi\Routing\Tests\Slim;
 
 use PHPUnit\Framework\TestCase;