Laravel testing

I have an api that not use authentication of laravel but I use custom guard

use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
 
/**
 * Register any application authentication / authorization services.
 */
public function boot(): void
{
    Auth::viaRequest('custom-token', function (Request $request) {
        return User::where('token', (string) $request->token)->first();
    });
}

How can I use Laravel testing to test my api, I have tried withHeader with Authentication but it not works