old_contents: module.exports = function(config) {
      config.set({
          frameworks: ['mocha'],
          browsers: ['Firefox', 'PhantomJS'],
          files: [require.resolve('es5-shim'), 'build/test.js'],
          reporters: ['dots']
      });
  
      if (process.env.CI && process.env.SAUCE_ACCESS_KEY) {
          var customLaunchers = {
              sauceLabsFirefox: {
                  base: 'SauceLabs',
                  browserName: 'firefox'
              },
              sauceLabsChrome: {
                  base: 'SauceLabs',
                  browserName: 'chrome'
              },
              sauceLabsIE11: {
                  base: 'SauceLabs',
                  browserName: 'internet explorer',
                  version: 11
              },
              sauceLabsIE10: {
                  base: 'SauceLabs',
                  browserName: 'internet explorer',
                  version: 10
              },
              sauceLabsIE9: {
                  base: 'SauceLabs',
                  browserName: 'internet explorer',
                  version: 9
              },
              sauceLabsIE8: {
                  base: 'SauceLabs',
                  browserName: 'internet explorer',
                  version: 8
              }
          };
  
          config.set({
              browsers: Object.keys(customLaunchers),
              reporters: ['dots', 'saucelabs'],
              captureTimeout: 120000,
              sauceLabs: {
                  testName: 'Loud'
              },
              customLaunchers: customLaunchers
          });
      }
  };
  
new_contents: module.exports = function(config) {
      config.set({
          frameworks: ['mocha'],
          browsers: ['Firefox', 'PhantomJS'],
          files: [require.resolve('es5-shim'), 'build/test.js'],
          reporters: ['dots']
      });
  
      if (process.env.CI && process.env.SAUCE_ACCESS_KEY) {
          var customLaunchers = {
              sauceLabsFirefox: {
                  base: 'SauceLabs',
                  browserName: 'firefox'
              },
              sauceLabsChrome: {
                  base: 'SauceLabs',
                  browserName: 'chrome'
              }
          };
  
          config.set({
              browsers: Object.keys(customLaunchers),
              reporters: ['dots', 'saucelabs'],
              captureTimeout: 120000,
              sauceLabs: {
                  testName: 'Loud'
              },
              customLaunchers: customLaunchers
          });
      }
  };
  
subject: Revert "Test in Internet Explorer in SauceLabs"