diff --git a/tox.ini b/tox.ini
index beb8a7182b..ef60d136e9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 1.8
 skipsdist = True
-envlist = py34,py27,pep8
+envlist = py35,py34,py27,pep8
 
 [testenv]
 usedevelop = True