karma.sauce.conf.js

// import base configuration
var base = require('./karma.conf');

module.exports = function(config) {
  var customLaunchers = {
    sl_chrome: {
      base: 'SauceLabs',
      browserName: 'chrome',
      platform: 'Windows 7',
      version: '35'
    },
    sl_firefox: {
      base: 'SauceLabs',
      browserName: 'firefox',
      version: '30'
    },
    sl_ios_safari: {
      base: 'SauceLabs',
      browserName: 'iphone',
      platform: 'OS X 10.9',
      version: '7.1'
    },
    sl_ie_11: {
      base: 'SauceLabs',
      browserName: 'internet explorer',
      platform: 'Windows 8.1',
      version: '11'
    }
  };
  // apply base settings
  base(config);
  // then override
  config.set({
    sauceLabs: {
      testName: 'Cedar Unit Tests'
    },
    customLaunchers: customLaunchers,
    browsers: Object.keys(customLaunchers),
    reporters: ['progress', 'saucelabs'],
    singleRun: true
  });
};