diff --git a/tox.ini b/tox.ini
index bbeb1b4aa..199ee3857 100644
--- a/tox.ini
+++ b/tox.ini
@@ -42,6 +42,9 @@ commands =
 [testenv:venv]
 commands = {posargs}
 
+[testenv:docs]
+commands = python setup.py build_sphinx
+
 [testenv:py27local]
 sitepackages = False