diff --git a/test-requirements.txt b/test-requirements.txt
index a3fcd81..719d5c3 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,6 +6,7 @@ hacking<0.12,>=0.11.0 # Apache-2.0
 
 coverage>=3.6 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
+mock>=2.0.0 # BSD
 sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0