old_contents: var version = require('./package.json').version;
  var ts = new Date().getTime();
  
  module.exports = function(config) {
    var auth;
  
    try {
      auth = require('./test/auth/index');
    } catch(ex) {
      auth = {};
      auth.SAUCE_USERNAME = process.env.SAUCE_USERNAME || null;
      auth.SAUCE_ACCESS_KEY = process.env.SAUCE_ACCESS_KEY || null;
    }
  
    if (!auth.SAUCE_USERNAME || !auth.SAUCE_ACCESS_KEY) return;
    if (process.env.SKIP_SAUCE) return;
  
    var branch = process.env.TRAVIS_BRANCH || 'local'
    var browserConfig = require('./sauce.browsers');
    var browsers = Object.keys(browserConfig);
    var tags = [ 'chaijs_' + version, auth.SAUCE_USERNAME + '@' + branch ];
    var tunnel = process.env.TRAVIS_JOB_NUMBER || ts;
  
    if (process.env.TRAVIS_JOB_NUMBER) {
      tags.push('travis@' + process.env.TRAVIS_JOB_NUMBER);
    }
  
    config.browsers = config.browsers.concat(browsers);
    config.customLaunchers = browserConfig;
    config.reporters.push('saucelabs');
    config.captureTimeout = 300000;
  
    config.sauceLabs = {
        username: auth.SAUCE_USERNAME
      , accessKey: auth.SAUCE_ACCESS_KEY
      , startConnect: ('TRAVIS' in process.env) === false
      , tags: tags
      , testName: 'ChaiJS'
      , tunnelIdentifier: tunnel
    };
  };
  
new_contents: var version = require('./package.json').version;
  var ts = new Date().getTime();
  
  module.exports = function(config) {
    var auth;
  
    try {
      auth = require('./test/auth/index');
    } catch(ex) {
      auth = {};
      auth.SAUCE_USERNAME = process.env.SAUCE_USERNAME || null;
      auth.SAUCE_ACCESS_KEY = process.env.SAUCE_ACCESS_KEY || null;
    }
  
    if (!auth.SAUCE_USERNAME || !auth.SAUCE_ACCESS_KEY) return;
    if (process.env.SKIP_SAUCE) return;
  
    var branch = process.env.TRAVIS_BRANCH || 'local'
    var browserConfig = require('./sauce.browsers');
    var browsers = Object.keys(browserConfig);
    var tags = [ 'chaijs_' + version, auth.SAUCE_USERNAME + '@' + branch ];
    var tunnel = process.env.TRAVIS_JOB_NUMBER || ts;
  
    if (process.env.TRAVIS_JOB_NUMBER) {
      tags.push('travis@' + process.env.TRAVIS_JOB_NUMBER);
    }
  
    config.browsers = config.browsers.concat(browsers);
    Object.assign(config.customLaunchers, browserConfig);
    config.reporters.push('saucelabs');
    config.captureTimeout = 300000;
  
    config.sauceLabs = {
        username: auth.SAUCE_USERNAME
      , accessKey: auth.SAUCE_ACCESS_KEY
      , startConnect: ('TRAVIS' in process.env) === false
      , tags: tags
      , testName: 'ChaiJS'
      , tunnelIdentifier: tunnel
    };
  };
  
subject: fix sauce config for headless chrome