diff --git a/PRESUBMIT.cfg b/PRESUBMIT.cfg
index 420337e..8238211 100644
--- a/PRESUBMIT.cfg
+++ b/PRESUBMIT.cfg
@@ -1,5 +1,8 @@
 # This project uses BSD/GPLv2 for the license and tabs for indentation.
 
+[Hook Scripts]
+fmap_unittest py2 = python2 ./fmap_unittest.py
+
 [Hook Overrides]
 cros_license_check: false
 tab_check: false