diff --git a/tox.ini b/tox.ini
index 2b768c6..4a0ba72 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@
 
 [tox]
 minversion = 1.6
-envlist = py34,py27,pep8
+envlist = py35,py34,py27,pep8
 skipsdist = True
 
 [testenv]