diff --git a/codereview.settings b/codereview.settings
index fe2e4e9db49..e950dfcbf1f 100644
--- a/codereview.settings
+++ b/codereview.settings
@@ -3,3 +3,4 @@ GERRIT_HOST: True
 CODE_REVIEW_SERVER: https://dart-review.googlesource.com
 VIEW_VC: https://dart.googlesource.com/sdk/+
 CC_LIST: reviews@dartlang.org
+USE_PYTHON3: True