diff --git a/tox.ini b/tox.ini
index 3205461cba..ac22896de4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,pep8
+envlist = py34,py27,pep8
 minversion = 1.6
 skipsdist = True
 
@@ -25,6 +25,10 @@ setenv = VIRTUAL_ENV={envdir}
 [tox:jenkins]
 downloadcache = ~/cache/pip
 
+[testenv:py34]
+commands =
+  nosetests test/unit/common/test_exceptions.py
+
 [testenv:pep8]
 commands =
   flake8 {posargs:swift test doc setup.py}