diff --git a/tox.ini b/tox.ini
index dc4cbaf53..1072b79a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,6 +26,7 @@ commands =
 commands = {posargs}
 
 [testenv:docs]
+basepython = python2.7
 commands = python setup.py build_sphinx
 
 [testenv:py27-func-rabbit]