diff --git a/docs/scenarios/ci.rst b/docs/scenarios/ci.rst
index 285e522..d2abfa9 100644
--- a/docs/scenarios/ci.rst
+++ b/docs/scenarios/ci.rst
@@ -29,4 +29,9 @@ Mule?
 Tox
 ---
 
-.. todo:: Write about `Tox <http://codespeak.net/~hpk/tox/>`_
+`tox <https://bitbucket.org/hpk42/tox>`_ is an automation tool providing packaging, testing and deployment of Python software right from the console or CI server.
+It is a generic virtualenv management and test command line tool which provides the following features:
+
+* Checking that packages install correctly with different Python versions and interpreters
+* Running tests in each of the environments, configuring your test tool of choice
+* Acting as a frontend to Continuous Integration servers, reducing boilerplate and merging CI and shell-based testing.
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