diff --git a/tox.ini b/tox.ini
index 91bf576..1d853fd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = pep8,py27
+envlist = pep8,py27,py35
 skipsdist = True
 
 [testenv]