diff --git a/tox.ini b/tox.ini
index df89498..7a00027 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,6 +26,9 @@
 commands =
   python setup.py testr --coverage
 
+[testenv:doc]
+commands = python setup.py build_sphinx
+
 [testenv:venv]
 commands = {posargs}