old_contents: // Karma configuration
  // Generated on Tue Oct 10 2017 16:05:16 GMT+0300 (EEST)
  
  module.exports = {
    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',
  
    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['mocha', 'chai', 'sinon'],
  
    // list of files / patterns to load in the browser
    files: [],
  
    // list of files to exclude
    exclude: [],
  
    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {},
  
    plugins: [
      'karma-mocha',
      'karma-mocha-reporter',
      'karma-chai',
      'karma-sinon',
      'karma-chrome-launcher',
      'karma-firefox-launcher',
      'karma-failed-reporter'
    ],
  
    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['mocha'],
  
    // web server port
    port: 9876,
  
    // enable / disable colors in the output (reporters and logs)
    colors: true,
  
    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,
  
    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['ChromeHeadless', 'FirefoxHeadless'],
  
    customLaunchers: {
      FirefoxHeadless: {
        base: 'Firefox',
        flags: ['-headless']
      }
    },
  
    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,
  
    // Concurrency level
    // how many browser should be started simultaneous
    concurrency: 2,
  
    client: {
      mocha: {
        reporter: 'html',
        ui: 'bdd'
      }
    }
  };
  
new_contents: // Karma configuration
  // Generated on Tue Oct 10 2017 16:05:16 GMT+0300 (EEST)
  
  module.exports = {
    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',
  
    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['mocha', 'chai', 'sinon'],
  
    // list of files / patterns to load in the browser
    files: [],
  
    // list of files to exclude
    exclude: [],
  
    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {},
  
    plugins: [
      'karma-mocha',
      'karma-mocha-reporter',
      'karma-chai',
      'karma-sinon',
      'karma-chrome-launcher',
      'karma-firefox-launcher',
      'karma-failed-reporter'
    ],
  
    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['mocha'],
  
    // web server port
    port: 9876,
  
    // enable / disable colors in the output (reporters and logs)
    colors: true,
  
    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,
  
    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['ChromeHeadlessNoSandbox', 'FirefoxHeadless'],
  
    customLaunchers: {
      ChromeHeadlessNoSandbox: {
        base: 'ChromeHeadless',
        flags: ['--no-sandbox', '--disable-setuid-sandbox']
      },
      FirefoxHeadless: {
        base: 'Firefox',
        flags: ['-headless']
      }
    },
  
    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,
  
    // Concurrency level
    // how many browser should be started simultaneous
    concurrency: 2,
  
    client: {
      mocha: {
        reporter: 'html',
        ui: 'bdd'
      }
    }
  };
  
subject: Fix ChromeLauncher for Travis integration tests (#1196)