diff --git a/tox.ini b/tox.ini
index 6c5454605..a8edaa66b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,3 +26,7 @@ setenv = NOSE_WITH_COVERAGE=1
 
 [testenv:venv]
 commands = {posargs}
+
+[testenv:docs]
+commands = python setup.py build_sphinx
+