diff --git a/test-requirements.txt b/test-requirements.txt
index 2d596fe..6d8a941 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 # mock object framework
-hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
+hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 flake8<2.6.0,>=2.5.4 # MIT
 nose # LGPL
 mock>=2.0 # BSD