Laravel Dusk test click() not working

I'm trying to run some tests on a Laravel project but even the most basic tests won't work.

Configuration:

• Laravel 5.5
• Dusk for tests
• MacOS High Sierra
• PHPStorm

I would like to test the login page.

First of all, I know I have to add an attribute to the <button> in resources->views->forms->user->login.blade.php:

Source :

My code:

<div class="submit-button-container">
    <button class="button" dusk="login-button">Connexion</button>
</div>

Then I create the LoginTest.phpfile:

<?php

namespace Tests\Browser;

use Tests\DuskTestCase;
use Laravel\Dusk\Browser;
use Illuminate\Foundation\Testing\DatabaseMigrations;

class LoginTest extends DuskTestCase
{
    /**
     * @throws \Exception
     * @throws \Throwable
     */
    public function testExample()
    {
        $this->browse( function (Browser $browser) {

            $browser->visit('se-connecter') //login page
                    ->click('@login-button'); //click the login button
        });
    }
}

When I run the command line php artisan dusk I get this error :**

The most important message is : no such element: Unable to locate element: {"method":"css selector","selector":"body [dusk="login-button"]"}

MY QUESTION IS:

• How do I define a selector as shown on the error message ?