diff --git a/.travis.yml b/.travis.yml
index fdad4a7..36a9c73 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ env:
     - TOX_ENV=py27
     - TOX_ENV=py34
     - TOX_ENV=pypy
+install: tox
 script: tox -e $TOX_ENV
 after_success:
     - coveralls