diff --git a/tox.ini b/tox.ini
index 98e0d0c0..3665fa69 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py35,py27,pep8,docs
+envlist = py36,py35,py27,pep8,docs
 minversion = 2.0
 skipsdist = True