// Be sure that selenium-server-standalone-3.141.59.jar is running public SeleniumTests(SeleniumServerFactory <Startup> server) { this.server = server; server.CreateClient(); var opts = new ChromeOptions(); opts.AddArgument("--headless"); // Optional, comment this out if you want to SEE the browser window opts.AddArgument("no-sandbox"); this.browser = new RemoteWebDriver(opts); }