Run Chrome Headless with WebdriverIO and selenium-standalone

wdio.conf.js

exports.config = {
  capabilities: [
    {
      browserName: 'chrome',
      chromeOptions: {
        args: ['headless', 'disable-gpu'],
      },
    },
  ],
  services: ['selenium-standalone'],
  seleniumInstallArgs: {
    logger: console.log,
    drivers: {
      chrome: {
        version: '2.29',
        arch: process.arch,
        baseURL: 'https://chromedriver.storage.googleapis.com',
      },
    },
  },
  seleniumArgs: {
    logger: console.log,
    drivers: {
      chrome: {
        version: '2.29',
      },
    },
  },
  /* ... all your other config ... */
};