diff --git a/tox.ini b/tox.ini
index 0d0be44bcf8464a678c9d04f8da5db66317d5c9b..3ffcaa937a8efa511d6601a8b807e6a70b65d5fd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,8 +26,7 @@ commands = {posargs}
 
 [testenv:docs]
 deps =
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 whitelist_externals = rm
 commands =