diff --git a/tox.ini b/tox.ini
index 5df70f025..c4d231e90 100644
--- a/tox.ini
+++ b/tox.ini
@@ -50,5 +50,6 @@ commands=
 
 [pycodestyle]
 # E402 module level import not at top of file
-ignore = E402
+# W504 line break after binary operator
+ignore = E402, W504