diff --git a/tox.ini b/tox.ini
index b85191c1..a7bb3e97 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,5 +3,7 @@ skipsdist = true
 envlist = py27,py34,py35
 
 [testenv]
-deps = -rrequirements.txt
+deps =
+    -rrequirements.txt
+    pytest-cookies
 commands = py.test {posargs:tests}