- add mock dependency
diff --git a/tox.ini b/tox.ini
index 47c0f29..09dae7f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,7 @@
 [tox]
 envlist = py26,py27,py33,py34
 [testenv]
-deps=pytest       # install pytest in the venvs
-commands=py.test  # or 'nosetests' or ...
+deps=pytest      
+     mock
+commands=py.test