1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 9d6c4999..8020146e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ deps =
     nose==1.3.7
     mock==2.0.0
     PyContracts==1.7.9
+    git+https://github.com/nedbat/unittest-mixins@master#egg=unittest_mixins==0.0
     py26: unittest2==1.1.0
     py{27,33,34,35,36}: gevent==1.1.1
     py{26,27,33,34,35,36}: eventlet==0.19.0