diff --git a/tox.ini b/tox.ini
index 9ccb9c3..9a74e90 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,9 +7,12 @@ deps =
   nose-cov
   pam
   requests
+  flake8
 
 [testenv]
-commands = nosetests []
+commands =
+  flake8
+  nosetests []
 
 [testenv:py33]
 deps =