diff --git a/presubmit_support.py b/presubmit_support.py
index 62a39be..111db58 100755
--- a/presubmit_support.py
+++ b/presubmit_support.py
@@ -1427,7 +1427,7 @@
 
 def ScanSubDirs(mask, recursive):
   if not recursive:
-    return [x for x in glob.glob(mask) if '.svn' not in x and '.git' not in x]
+    return [x for x in glob.glob(mask) if x not in ('.svn', '.git')]
   else:
     results = []
     for root, dirs, files in os.walk('.'):