diff --git a/test-requirements.txt b/test-requirements.txt
index 70bc3bf6..36d71587 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,6 +6,7 @@ hacking>=0.5.6,<0.7
 coverage>=3.6
 discover
 fixtures>=0.3.12
+mock>=0.8.0
 mox>=0.5.3
 sphinx>=1.1.2
 testscenarios>=0.4,<0.5