diff --git a/test-requirements.txt b/test-requirements.txt
index 9faa5d4b..e311cd07 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,6 +2,7 @@ coverage>=3.6
 discover
 fixtures>=0.3.14
 hacking>=0.9.2,<0.10
+mock>=1.0
 python-subunit>=0.0.18
 testrepository>=0.0.18
 testscenarios>=0.4