diff --git a/tox.ini b/tox.ini
index 8ca944a..27deb69 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@ skip_missing_interpreters=True
 # Removed pypy3 due to issues with the psutil dependency on that python
 # version.
 #envlist = py27,py33,py34,pypy,pypy3
-envlist = py27,py33,py34,pypy
+envlist = py27,py33,py34,py35,pypy
 
 [testenv]
 deps=