diff --git a/.php_cs b/.php_cs
index 233c4e9..8d02bce 100644
--- a/.php_cs
+++ b/.php_cs
@@ -1,7 +1,10 @@
 <?php
 
 $config = new Amp\CodeStyle\Config();
-$config->getFinder()->in(__DIR__);
+$config->getFinder()
+    ->in(__DIR__ . '/examples')
+    ->in(__DIR__ . '/lib')
+    ->in(__DIR__ . '/test');
 
 $cacheDir = getenv('TRAVIS') ? getenv('HOME') . '/.php-cs-fixer' : __DIR__;