diff --git a/tox.ini b/tox.ini
index 960259a..33d2606 100644
--- a/tox.ini
+++ b/tox.ini
@@ -73,3 +73,9 @@ commands =
 
 [testenv:docs]
 commands = python setup.py build_sphinx
+
+[testenv:requests-tip]
+deps =
+    six
+    -egit+https://github.com/kennethreitz/requests.git#egg=requests
+    -r{toxinidir}/test-requirements.txt