diff --git a/setup.cfg b/setup.cfg
index 7191faf..0e6e1ca 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,4 +6,4 @@ universal=1
 
 [flake8]
 ignore = E501, E402
-exclude = docs/conf.py
+exclude = docs/conf.py,.tox