phpvms/app/Providers/EventServiceProvider.php

<?php

namespace App\Providers;

use App\Listeners\NotificationEventListener;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;


class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        /*'App\Events\TestEvent' => [
            'App\Listeners\EventListener',
        ],*/
    ];

    protected $subscribe = [
        NotificationEventListener::class,
    ];

    /**
     * Register any events for your application.
     *
     * @return void
     */
    public function boot()
    {
        parent::boot();
    }
}