diff --git a/test-requirements.txt b/test-requirements.txt
index 2b3607d..7115168 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -7,6 +7,7 @@
 python-subunit>=0.0.18
 oslosphinx>=2.5.0 # Apache-2.0
 mox>=0.5.3
-mock>=1.0
+mock>=1.1;python_version!='2.6'
+mock==1.0.1;python_version=='2.6'
 coverage>=3.6
 oslotest>=1.5.1 # Apache-2.0