diff --git a/Tests/Functional/TestKernel.php b/Tests/Functional/TestKernel.php
index be7a2298..bd913f2f 100644
--- a/Tests/Functional/TestKernel.php
+++ b/Tests/Functional/TestKernel.php
@@ -81,16 +81,6 @@ public function getLogDir()
         return $this->getBaseDir().'log';
     }
 
-    public function serialize()
-    {
-        return serialize($this->useVichUploaderBundle);
-    }
-
-    public function unserialize($str)
-    {
-        $this->__construct(unserialize($str));
-    }
-
     /**
      * {@inheritdoc}
      */
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 48d0a080..4fb614bb 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -1,5 +1,5 @@
 parameters:
-    level: 0
+    level: 1
     paths:
         - .
     excludes_analyse: