diff --git a/test-requirements.txt b/test-requirements.txt
index fde3cf22b4..f994b5c948 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,7 +6,8 @@
 hacking<0.11,>=0.10.0
 coverage>=3.6
 discover
-mock>=1.0
+mock>=1.1;python_version!='2.6'
+mock==1.0.1;python_version=='2.6'
 mox>=0.5.3
 mox3>=0.7.0
 PyMySQL>=0.6.2 # MIT License