diff --git a/tox.ini b/tox.ini
index 30ca5465..61ef19ea 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 minversion = 2.0
 skipsdist = True
-envlist = py34,py27,pep8,pypy
+envlist = py{35,34,27},pep8,pypy
 
 [testenv]
 usedevelop = True