diff --git a/requirements.txt b/requirements.txt
index 9cb442071..aadbfa9ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,3 +14,4 @@ pytest==2.8.2
 git+git://github.com/mverteuil/pytest-ipdb.git
 pep8==1.6.2
 pyflakes==1.0.0
+tox==2.1.1