diff --git a/tox.ini b/tox.ini
index ac5cfc8a56..6f66a9a4d5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,7 +40,9 @@ commands =
 [flake8]
 show-source = True
 exclude = .tox,.test
-ignore = E125,H
+# These are ignored intentionally in openstack-infra projects;
+# please don't submit patches that solely correct them or enable them.
+ignore = E125,E129,E402,H,W503
 
 [testenv:grafyaml]
 basepython = python2.7