diff --git a/tox.ini b/tox.ini
index 81c08d5023fdb8809b4c1186b1c56d7d20d1ca29..ba8f673edc6f21641ddf50d309b166783f5b438c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,3 +6,8 @@ deps=pytest
     responses
     mock
 commands=py.test -v --pep8 mwclient tests
+
+[flake8]
+max-line-length=90
+[pep8]
+max-line-length=90