diff --git a/tox.ini b/tox.ini
index ca30150d2..47b745a2a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -109,8 +109,7 @@ deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
-commands =
-  sphinx-build -b html doc/source doc/build/html
+commands = python setup.py build_sphinx
 
 [testenv:releasenotes]
 deps =