diff --git a/test-requirements.txt b/test-requirements.txt
index ff2745ef..3c40bcf5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,7 @@ discover
 coverage>=3.6
 mock>=1.0
 testrepository>=0.0.17
-testtools>=0.9.32
+testtools>=0.9.32,<0.9.35
 # ZooKeeper
 kazoo>=1.3.1
 zake>=0.0.7