diff --git a/tox.ini b/tox.ini
index 57fc892c..0648ff7d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,8 @@ setenv = VIRTUAL_ENV={envdir}
          PYTHONDONTWRITEBYTECODE=1
 deps = -r{toxinidir}/requirements/requirements.txt
        -r{toxinidir}/tests/test-requirements.txt
-commands = pip install git+https://github.com/stackforge/opencafe.git#egg=cafe
+commands = pip install -U mock==1.0.1
+           pip install git+https://github.com/stackforge/opencafe.git#egg=cafe
            nosetests {posargs:--exclude=api --exclude=endtoend --nologcapture}