diff --git a/test-requirements.txt b/test-requirements.txt
index 805eeb1f..028c9536 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,8 @@
 
 hacking<0.11,>=0.10.0
 oslotest>=1.5.1 # Apache-2.0
-mock>=1.0
+mock>=1.1;python_version!='2.6'
+mock==1.0.1;python_version=='2.6'
 testtools>=1.4.0
 testscenarios>=0.4