1 files changed, 9 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 6c7b972..f919f76 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py25,py26,py27,py32,pypy
+envlist = py25,py26,py27,py32,py33,pypy
 
 [pytest]
 addopts = -n4 -v --cov rsa --cov-report term-missing # --doctest-modules
@@ -39,6 +39,14 @@ deps=pyasn1 >=0.1.3
      pytest-xdist
      pytest-cov
 
+[testenv:py33]
+deps=pyasn1 >=0.1.3
+     coverage >= 3.5
+     unittest2py3k
+     PyTest
+     pytest-xdist
+     pytest-cov
+
 [testenv:pypy]
 deps=pyasn1 >=0.1.3
      coverage >= 3.5