diff --git a/tox.ini b/tox.ini
index 7f69fad..4f2465a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -84,6 +84,11 @@
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
+[testenv:docs]
+commands = python setup.py build_sphinx {posargs}
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+
 [testenv:pep8]
 commands =
    flake8 {posargs}