diff --git a/.travis.yml b/.travis.yml
index f147e3ea95..f4a8d5e8e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ before_script:
   update-types".' && false)
 script:
 - wct -l chrome
-- wct -l firefox
+- xvfb-run wct -l firefox
 - if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then travis_wait 30 ./util/travis-sauce-test.sh; fi
 env:
   global:
diff --git a/wct.conf.json b/wct.conf.json
index 5b315d7362..8c061cea55 100644
--- a/wct.conf.json
+++ b/wct.conf.json
@@ -10,9 +10,6 @@
           "headless",
           "disable-gpu",
           "no-sandbox"
-        ],
-        "firefox": [
-          "-headless"
         ]
       }
     }