example.conf.js

const path = require('path')

const chromeArgs = [
    '--headless',
    '--single-process',
    '--disable-gpu',
    '--disable-background-timer-throttling',
    '--disable-breakpad',
    '--disable-client-side-phishing-detection',
    '--disable-cloud-import',
    '--disable-default-apps',
    '--disable-dev-shm-usage',
    '--disable-extensions',
    '--disable-gesture-typing',
    '--disable-hang-monitor',
    '--disable-infobars',
    '--disable-notifications',
    '--disable-offer-store-unmasked-wallet-cards',
    '--disable-offer-upload-credit-cards',
    '--disable-popup-blocking',
    '--disable-print-preview',
    '--disable-prompt-on-repost',
    '--disable-setuid-sandbox',
    '--disable-speech-api',
    '--disable-sync',
    '--disable-tab-for-desktop-share',
    '--disable-translate',
    '--disable-voice-input',
    '--disable-wake-on-wifi',
    '--enable-async-dns',
    '--enable-simple-cache-backend',
    '--enable-tcp-fast-open',
    '--enable-webgl',
    '--hide-scrollbars',
    '--ignore-gpu-blacklist',
    '--media-cache-size=33554432',
    '--metrics-recording-only',
    '--mute-audio',
    '--no-default-browser-check',
    '--no-first-run',
    '--no-pings',
    '--no-sandbox',
    '--no-zygote',
    '--password-store=basic',
    '--prerender-from-omnibox=disabled',
    '--use-gl=swiftshader',
    '--use-mock-keychain'
];

exports.config = {
    /**
     * server configurations
     */
    port: '9515',
    path: '/',

    /**
     * specify test files
     */
    specs: ['example.spec.js'],

    /**
     * capabilities
     */
    capabilities: [{
        browserName: 'chromium',
        chromeOptions: {
            args: chromeArgs,
            binary: '/tmp/browsers/chromium-latest'
        }
    }],

    services: ['chromedriver'],

    /**
     * test configurations
     */
    logLevel: 'verbose',
    coloredLogs: true,
    framework: 'mocha',
    outputDir: __dirname,

    reporters: ['dot'],

    mochaOpts: {
        ui: 'bdd',
        timeout: 60000
    }
}

example.spec.js

const expect = require('chai').expect;

describe('example tests', function () {
    it('Google has a title', function () {
        browser.url('https://google.com');
        const title = browser.getTitle();
        expect(title).to.exist;
        expect(title).to.be.a('string');
    });
});

lambda run output

/var/task/node_modules/lib-webdriverio-nodejs/lib/wdio
[17:24:20]  COMMAND	POST 	 "/session"
[17:24:20]  DATA		{"desiredCapabilities":{"javascriptEnabled":true,"locationContextEnabled":true,"handlesAlerts":true,"rotatable":true,"browserName":"chrome","chromeOptions":{"args":["--headless","--single-process","--disable-gpu","--disable-background-timer-throttling","--disable-breakpad","--disable-client-side-phishing-detection","--disable-cloud-import","--disable-default-apps","--disable-dev-shm-usage","--disable-extensions","(34 more items)"],"binary":"/tmp/browsers/chromium-latest"},"loggingPrefs":{"browser":"ALL","driver":"ALL"},"requestOrigins":{"url":"http://webdriver.io","version":"4.14.4","name":"webdriverio"}}}
ERROR: ESOCKETTIMEDOUT
chrome
    at new RuntimeError (/var/task/node_modules/webdriverio/build/lib/utils/ErrorHandler.js:143:12)
    at Request._callback (/var/task/node_modules/webdriverio/build/lib/utils/RequestHandler.js:342:43)
    at self.callback (/var/task/node_modules/request/request.js:185:22)
    at emitOne (events.js:116:13)
    at Request.emit (events.js:211:7)
    at ClientRequest.<anonymous> (/var/task/node_modules/request/request.js:819:16)
    at Object.onceWrapper (events.js:313:30)
    at emitNone (events.js:106:13)
    at ClientRequest.emit (events.js:208:7)
    at Socket.emitTimeout (_http_client.js:679:34)