Laravel收银台:单元测试显式调度WebhookReceived事件不起作用

我正在构建一个Laravel应用程序。我正在使用Laravel收银台处理我的应用程序中的订阅。我正在为StripeWebhook编写单元测试,并为此创建一个自定义事件侦听器。

我有一个事件监听器,如下所示:

class StripeEventListener
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  object  $event
     * @return void
     */
    public function handle(WebhookReceived $event)
    {
        if ($event->payload['type'] === 'invoice.payment_succeeded') {
            // Handle the incoming event...
        }
        // TODO: write unit test for this event.
        if ($event->payload['type'] === 'customer.subscription.updated') {
            // Handle the incoming event...
            // handleCustomerSubscriptionUpdated
            if ($user = $this->getUserByStripeId($event->payload['data']['object']['customer'])) {
                $data = $event->payload['data']['object'];
                if (
                    isset($data['status']) &&
                    ($data['status'] === StripeSubscription::STATUS_INCOMPLETE_EXPIRED ||
                    $data['status'] == StripeSubscription::STATUS_INCOMPLETE)
                ) {
                    if (! $user->payment_method_needs_updating) {
                        $user->payment_method_needs_updating = true;
                        $user->save();
                    }
                }
            }
        }
    }

    protected function getUserByStripeId($stripeId)
    {
        return Cashier::findBillable($stripeId);
    }
}

然后我将其绑定到EventServiceProvider中的WebhookReceived事件,如下所示:

protected $listen = [
        WebhookReceived::class => [
            StripeEventListener::class
        ],
        Registered::class => [
            SendEmailVerificationNotification::class,
        ],
    ];

我正在对侦听器进行单元测试,该侦听器调度WebhookReceived事件,如下所示:

WebhookReceived::dispatch([
            .... mock data
        ]);

但我得到了这个错误:

   Illuminate\Contracts\Container\BindingResolutionException 

  Target class [events] does not exist.

  at vendor/laravel/framework/src/Illuminate/Container/Container.php:879
    875▕ 
    876▕         try {
    877▕             $reflector = new ReflectionClass($concrete);
    878▕         } catch (ReflectionException $e) {
  ➜ 879▕             throw new BindingResolutionException("Target class [$concrete] does not exist.", 0, $e);
    880▕         }

我该如何修复它,或者如何对它进行单元测试?