diff --git a/.travis.yml b/.travis.yml
index cd5d953b..eda63217 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,7 +45,7 @@ install:
   python-tk
 - travis_retry pip install tox>=1.9
 script:
-- tox -e $(echo py$TRAVIS_PYTHON_VERSION-mg$PYMONGO-dj$DJANGO | tr -d . | sed -e 's/pypypy/pypy/') -- with-coverage
+- tox -e $(echo py$TRAVIS_PYTHON_VERSION-mg$PYMONGO-dj$DJANGO | tr -d . | sed -e 's/pypypy/pypy/') -- --with-coverage
 after_script: coveralls --verbose
 notifications:
   irc: irc.freenode.org#mongoengine