diff --git a/virtstrap-core/tox.ini b/virtstrap-core/tox.ini
index 4c5584c..fa3178f 100644
--- a/virtstrap-core/tox.ini
+++ b/virtstrap-core/tox.ini
@@ -7,6 +7,7 @@ deps=
     virtualenv
     fudge
     pypiserver
+    mock
     
 commands=
     nosetests