diff --git a/tests/App/AppKernel.php b/tests/App/AppKernel.php
index 64128a60..273538a6 100644
--- a/tests/App/AppKernel.php
+++ b/tests/App/AppKernel.php
@@ -37,13 +37,8 @@ public function registerContainerConfiguration(LoaderInterface $loader): void
     {
         $loader->load(__DIR__.'/config.yml');
 
-        if (Kernel::MAJOR_VERSION >= 5) {
-            $loader->load(__DIR__.'/security_5.yml');
-            $loader->load(__DIR__.'/session_5.yml');
-        } else {
-            $loader->load(__DIR__.'/security_4.yml');
-            $loader->load(__DIR__.'/session_4.yml');
-        }
+        $loader->load(__DIR__.'/security_5.yml');
+        $loader->load(__DIR__.'/session_5.yml');
     }
 
     public function getCacheDir(): string
diff --git a/tests/App/security_4.yml b/tests/App/security_4.yml
deleted file mode 100644
index 142c7ed3..00000000
--- a/tests/App/security_4.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-security:
-    encoders:
-        # in_memory users
-        Symfony\Component\Security\Core\User\User: plaintext
-        # User entity
-        Liip\Acme\Tests\App\Entity\User: plaintext
diff --git a/tests/App/session_4.yml b/tests/App/session_4.yml
deleted file mode 100644
index 19258079..00000000
--- a/tests/App/session_4.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-imports:
-    - session.yml
-
-framework:
-    session:
-        storage_id: session.storage.mock_file