diff --git a/test-requirements.txt b/test-requirements.txt
index bf83cd43..9c76e397 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,6 +5,6 @@ bandit>=1.1.0 # Apache-2.0
 flake8<2.6.0,>=2.5.4 # MIT
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
-mock>=2.0 # BSD
+mock>=2.0.0 # BSD
 oslotest>=1.10.0 # Apache-2.0
 os-testr>=0.8.0 # Apache-2.0