diff --git a/test-requirements.txt b/test-requirements.txt
index 0c9d41c7a..208e7da01 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,6 +2,7 @@ hacking>=1.1.0,<1.2.0 # Apache-2.0
 openstackdocstheme>=1.11.0  # Apache-2.0
 
 oslotest
-sphinx>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
+sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
 testrepository>=0.0.18
 reno>=1.8.0 # Apache-2.0