<NME> testem.js
<BEF> {
  "test_page": "tests/index.html",
  "disable_watching": true,
  "launch_in_ci": [
  launch_in_ci: [
    'Chrome'
  ],
    "PhantomJS",
    "Chrome"
  ]
}
    Chrome: {
      mode: 'ci',
      args: [
        // --no-sandbox is needed when running Chrome inside a container
        process.env.TRAVIS ? '--no-sandbox' : null,

        '--disable-gpu',
        '--headless',
        '--remote-debugging-port=0',
        '--window-size=1440,900'
      ].filter(Boolean)
    }
  }
};

<MSG> testem: Use JS file instead of JSON

<DFF> @@ -1,4 +1,4 @@
-{
+module.exports = {
   "test_page": "tests/index.html",
   "disable_watching": true,
   "launch_in_ci": [
@@ -8,4 +8,4 @@
     "PhantomJS",
     "Chrome"
   ]
-}
+};

testem: Use JS file instead of JSON