diff --git a/tox.ini b/tox.ini
index 161e86fb..c699ac48 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,4 +3,5 @@ envlist = py26, py27, pypy, py33
 
 [testenv]
 deps = -egit+git://github.com/mitsuhiko/werkzeug.git@sprint-branch#egg=werkzeug
+       -egit+git://github.com/mitsuhiko/itsdangerous.git#egg=itsdangerous
 commands = python run-tests.py []