.travis.yml in textbringer-0.1.4 vs .travis.yml in textbringer-0.1.5

@@ -3,10 +3,10 @@
 rvm:
 - 2.3.3
 - 2.4.0
 cache: bundler
 script:
-- bundle exec rake test
+- xvfb-run bundle exec rake test
 - bundle exec bundle-audit check --update
 notifications:
   email:
     on_success: never
     on_failure: always