diff --git a/tox.ini b/tox.ini
index d2bdd72d9..5f06635d8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py35,py27,pep8,docs
+envlist = py36,py35,py27,pep8,docs
 skipsdist = True
 
 [testenv]