diff --git a/test-requirements.txt b/test-requirements.txt
index 5e3c51d..740f14a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 hacking>=0.9,<=0.10.0
-mock
+mock!=1.1.1,<=1.3.0
 Sphinx>=1.1.2,<1.2
 discover
 fixtures>=0.3.14