diff --git a/.php_cs.dist b/.php_cs.dist
index 89785df0903..e73a61b8139 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -3,6 +3,7 @@
 $finder = PhpCsFixer\Finder::create()
     ->in('tests/')
     ->exclude('syntax/volt/')
+    ->exclude('_support/_generated/')
     ->exclude('_data/fixtures/Annotations/');
 
 return PhpCsFixer\Config::create()