diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 767eac6e7..2877144f3 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -18,6 +18,7 @@ def CommonChecks(input_api, output_api, tests_to_black_list):
   black_list = list(input_api.DEFAULT_BLACK_LIST) + [
       r'^cpplint\.py$',
       r'^cpplint_chromium\.py$',
+      r'^external_bin[\/\\].+',
       r'^python[0-9]*_bin[\/\\].+',
       r'^site-packages-py[0-9]\.[0-9][\/\\].+',
       r'^svn_bin[\/\\].+',