diff --git a/tox.ini b/tox.ini
index da3ebf1b35f..f9383430f66 100644
--- a/tox.ini
+++ b/tox.ini
@@ -55,6 +55,9 @@ commands =
 [testenv:venv]
 commands = {posargs}
 
+[testenv:docs]
+commands = python setup.py build_sphinx
+
 [flake8]
 # E125 continuation line does not distinguish itself from next logical line
 # E126 continuation line over-indented for hanging indent