diff --git a/tests/pycodestyle.cfg b/tests/pycodestyle.cfg
index a2ccb552..88b996fe 100644
--- a/tests/pycodestyle.cfg
+++ b/tests/pycodestyle.cfg
@@ -21,7 +21,8 @@ format = pylint
 # E306: Expected 1 blank line before a nested definition
 # E402: Module level import not at top of file
 # E501: Line too long (82 > 79 characters)
+# W504: line break after binary operator
 # E741: Do not use variables named ‘l’, ‘O’, or ‘I’
 
 
-ignore = E122, E123, E126, E127, E128, E129, E221, E241, E301, E303, E305, E306, E402, E501, E741
+ignore = E122, E123, E126, E127, E128, E129, E221, E241, E301, E303, E305, E306, E402, E501, W504, E741