test.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>TZLookup Tests</title>
    <link rel="stylesheet" media="all" href="https://cdnjs.cloudflare.com/ajax/libs/mocha/3.2.0/mocha.min.css">
  </head>
  <body>
    <div id="mocha"></div>
    <div id="messages"></div>
    <div id="fixtures"></div>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/mocha/3.2.0/mocha.min.js"></script>
    <script>mocha.setup("bdd");</script>

    <script src="tz.js"></script>
    <script src="test.js"></script>

    <script>mocha.run();</script>
  </body>
</html>