diff --git a/.php_cs.dist b/.php_cs.dist
index 95c872e8..e7351a67 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -4,7 +4,7 @@ use PhpCsFixer\Config;
 use Symfony\Component\Finder\Finder;
 
 $finder = new Finder();
-$finder->files()->in('src')->in('tests');
+$finder->files()->in('src')->in('src');
 
 return Config::create()
     ->setRules([