diff --git a/test-requirements.txt b/test-requirements.txt
index 6ba7df5f14..d62bcb21ca 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,7 +19,7 @@ python-ceilometerclient>=2.5.0 # Apache-2.0
 python-neutronclient>=5.1.0 # Apache-2.0
 python-openstackclient!=3.10.0,>=3.3.0 # Apache-2.0
 pytz>=2013.6 # MIT
-sphinx>=1.5.1 # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT