diff --git a/tox.ini b/tox.ini
index 3e0d370..b432aa9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = dummy, py26, py27, py32
+envlist = dummy, py26, py27, py32, py33, py34
 
 [testenv]
 commands = py.test {posargs:--cov pipdeptree --cov-report xml --cov-report html --cov-report term-missing tests/}
@@ -20,4 +20,4 @@ deps =
 
 [testenv:dummy]
 deps = -r{toxinidir}/tests/virtualenvs/dummy_requirements.txt
-commands =
\ No newline at end of file
+commands =