diff --git a/tox.ini b/tox.ini
index 5a11cfaa6..f30ba37b9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -196,6 +196,6 @@ filterwarnings =
     ignore:.*inspect.getargspec.*deprecated, use inspect.signature.*:DeprecationWarning
 
 [flake8]
-ignore = E702,E704,E712,E731
+ignore = E704,E712,E731
 max-line-length = 120
 exclude = _pytest/vendored_packages/pluggy.py