diff --git a/.travis.yml b/.travis.yml
index 5e2ac6138..99fd43041 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -49,4 +49,4 @@ before_script:
       fi
     - unset AWS_SECRET_ACCESS_KEY
 script:
-    - test/runtests.sh -x firefox/firefox
+    - test/runtests.sh -x firefox/firefox -f