diff --git a/tox.ini b/tox.ini
index 36dbf09b3..2a652f854 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,7 +43,6 @@ setenv = TRANSPORT_URL=rabbit://guest:guest@localhost
 show-source = True
 ignore = H237,H402,H405,H904
 exclude = .tox,dist,doc,*.egg,build,__init__.py
-builtins = _
 
 [hacking]
 import_exceptions =