diff --git a/tox.ini b/tox.ini
index 7da57c418..d2d963beb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,6 +22,10 @@ commands = flake8 nodepool
 commands =
   python setup.py testr --coverage
 
+[testenv:docs]
+commands =
+  python setup.py build_sphinx
+
 [testenv:venv]
 commands = {posargs}