diff --git a/test-requirements.txt b/test-requirements.txt
index 55f555c4..2d275f9b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,8 @@
 # process, which may cause wedges in the gate later.
 
 hacking<0.11,>=0.10.0
-mock>=1.0
+mock>=1.1;python_version!='2.6'
+mock==1.0.1;python_version=='2.6'
 oslotest>=1.5.1 # Apache-2.0
 
 # These are needed for docs generation