diff --git a/.travis.yml b/.travis.yml
index 40fea890d..ce38f0307 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,9 +4,6 @@ node_js:
 before_install:
   - npm i -g npm@latest
 
-  # Needed for Karma test runner
-  - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
 # install:
 #   - yarn install
 script:
diff --git a/karma.conf.js b/karma.conf.js
index accabf0d2..6f876ca05 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -9,7 +9,7 @@ module.exports = function(config) {
   config.set({
     frameworks: ["mocha", "sinon", "chai"],
 
-    browsers: ["Firefox"],
+    browsers: ["FirefoxHeadless"],
 
     singleRun: CONTINUOUS_INTEGRATION,
 
diff --git a/yarn.lock b/yarn.lock
index 845843393..1730edcce 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3887,8 +3887,8 @@ karma-coverage@^1.1.1:
     source-map "^0.5.1"
 
 karma-firefox-launcher@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/karma-firefox-launcher/-/karma-firefox-launcher-1.0.1.tgz#ce58f47c2013a88156d55a5d61337c099cf5bb51"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/karma-firefox-launcher/-/karma-firefox-launcher-1.1.0.tgz#2c47030452f04531eb7d13d4fc7669630bb93339"
 
 karma-mocha@^1.3.0:
   version "1.3.0"