Laravel dusk with browserstack to run tests on multiple devices and browsers

I know this is old, but I found this page while searching for a solution. I ended up building one myself that would probably meet your use-case. The biggest hurdle that I had was $this->browse() in a normal Dusk test was using a single instance of Laravel\Dusk\Browser and the new capabilities were not being pulled in. This implementation adds a function called performTest to the DuskTestCase.php file. This function loops through a set of capabilities and instantiates a new instance of Laravel\Dusk\Browser for each test. This function works similarly to the existing browse function in Laravel Dusk. You call performTest by passing it a callable that accepts a single parameter which is an instance of Laravel\Dusk\Browser

Dusk Test Case

<?php

namespace Tests;

use Laravel\Dusk\TestCase as BaseTestCase;
use Facebook\WebDriver\Remote\RemoteWebDriver;
use Facebook\WebDriver\Remote\DesiredCapabilities;

abstract class DuskTestCase extends BaseTestCase
{
    use CreatesApplication;
    protected array $capabilities;

    private const BROWSERS = [
        'ios_14_iphone_xs_safari' => [
            "os_version" => "14",
            "device" => "iPhone XS",
            "real_mobile" => "true",
            "browserstack.local" => "true",
            'acceptSslCerts' => 'true'                
        ],
        'mac_osx_catalina_safari' => [
            "os" => "OS X",
            "os_version" => "Catalina",
            "browser" => "Safari",
            "browser_version" => "13.0",
            "browserstack.local" => "true",
            "browserstack.selenium_version" => "3.14.0",
            "resolution" => "1920x1080",
            'acceptSslCerts' => 'true',
        ]
    ];



    /**
     * Create the RemoteWebDriver instance.
     *
     * @return \Facebook\WebDriver\Remote\RemoteWebDriver
     */
    protected function driver()
    {
        $browserStackConnectionUrl = config('browserstack.connection_url');
        return RemoteWebDriver::create(
            $browserStackConnectionUrl, $this->capabilities
        );
    }

    protected function performTest(Callable $test){
        foreach(self::BROWSERS as $browserName => $capabilitySet){
            try {
                $this->capabilities = $capabilitySet;
                $browser = $this->newBrowser($this->driver());
                $test($browser);
                $browser->quit();
                fprintf(STDOUT, "\e[0;32m√ {$browserName}\r\n");
            }
            catch(\Exception $exception){
                fprintf(STDOUT, "\e[0;31mX {$browserName}\r\n");
                throw $exception;
            }
        }
    }


}

Example Test

<?php

namespace Tests\Browser;

use Tests\DuskTestCase;
use Laravel\Dusk\Browser;

class ExampleTest extends DuskTestCase
{
    public function testExample()
    {
        $this->performTest(function(Browser $browser){
            $browser->visit('/')
                ->assertDontSee('Foobar');
        });
    }
}

config/browserstack.php

<?php

return [
    'connection_url' => env('BROWSERSTACK_CONNECTION_URL')
];