title: Puppeteer Travis-CI chrome-headless not working
body: <p>I'm trying to automate tests for my students. As a very basic example: write some HTML. So I created a test case to check for an unordered list.
  Anyway: It works locally, but it seems I can't get it to work on travis. I might miss a tiny thing, but no idea what's wrong:</p>
  
  <p><a href="https://travis-ci.com/maciossek/hft-asgmt-html-01/jobs/127338669/config" rel="nofollow noreferrer">https://travis-ci.com/maciossek/hft-asgmt-html-01/jobs/127338669/config</a>
  <a href="https://github.com/maciossek/hft-asgmt-html-01" rel="nofollow noreferrer">https://github.com/maciossek/hft-asgmt-html-01</a></p>
  
  <p>Any help highly appreciated!</p>