diff --git a/test-requirements.txt b/test-requirements.txt
index b663b22d..581f04d4 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,7 +8,8 @@ coverage>=3.6
 nose
 pexpect
 python-subunit>=0.0.18
-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
 openstackdocstheme>=1.11.0 # Apache-2.0
 oslotest>=1.2.0  # Apache-2.0
 stestr>=2.0.0 # Apache-2.0