diff --git a/tox.ini b/tox.ini
index 2524ea98..cd304421 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py34,py27,pep8,cover
+envlist = py35,py34,py27,pep8,cover
 
 [testenv]
 usedevelop = True