diff --git a/test-requirements.txt b/test-requirements.txt
index 16e09fd265..e9fbdf3587 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -17,7 +17,7 @@ os-testr>=1.0.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 qpid-python>=0.26;python_version=='2.7' # Apache-2.0
 psycopg2>=2.6.2 # LGPL/ZPL
-sphinx!=1.6.6,>=1.6.2 # BSD
+sphinx!=1.6.6,<1.7.0,>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT