diff --git a/test-requirements.txt b/test-requirements.txt
index 47584f9..fee08e0 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,6 +9,6 @@ mock>=2.0 # BSD
 oslotest>=1.10.0 # Apache-2.0
 pylint==1.4.5 # GPLv2
 python-subunit>=0.0.18 # Apache-2.0/BSD
-sphinx>=1.5.1 # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT