diff --git a/.travis.yml b/.travis.yml
index 872d303..cec4724 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,8 @@ addons:
 script:
 - npm install -g bower
 - bower install
-- xvfb-run wct
+- xvfb-run wct -l chrome
+- xvfb-run wct -l firefox
 - if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then wct -s 'windows 10/microsoftedge@14' -s 'windows 8.1/internet explorer@11' -s 'os x 10.11/safari@10' -s 'os x 10.11/safari@9'; fi
 env:
   global: