diff --git a/tox.ini b/tox.ini
index 7363931..9de1197 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,5 +33,4 @@ commands = oslo_debug_helper {posargs}
 
 show-source = True
 ignore = E123,E125,H803
-builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build