diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 9cb571c..afc36aa 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -12,7 +12,8 @@
 EOF;
 
 $finder = PhpCsFixer\Finder::create()
-    ->in(__DIR__)
+    ->in(__DIR__ . '/src')
+    ->in(__DIR__ . '/tests')
     ->ignoreVCSIgnored(true);
 
 return (new PhpCsFixer\Config())