diff -up parsedatetime-2.1/tox.ini.orig parsedatetime-2.1/tox.ini
--- parsedatetime-2.1/tox.ini.orig	2016-03-10 08:51:01.196099858 +0100
+++ parsedatetime-2.1/tox.ini	2016-03-10 08:51:05.129104799 +0100
@@ -1,6 +1,6 @@
 [tox]
 # this assumes that you have python2.7, python3.5, etc in PATH
-envlist = py27, py35
+envlist = py27, py34, py35
 
 [testenv]
 deps = PyICU