Laravel Event Fires but PHPUnit doesn't detect that it fired

I am running a test to ensure my events are firing properly.

MyTest

/** @test */
public function foil_products_DO_trigger_oos_event ()
{
    $this->setUpTheWorld(true, 1);
    $response = $this->sendInStockData($this->pusher, Carbon::now()->subHour());

    $this->expectsEvents(\App\Events\InventoryOutOfStock::class);
    $this->sendCustomStockData($this->pusher, 0, 1, Carbon::now());

    // TEST THE RESULTS OF THE LISTENER FOR THAT EVENT
    $this->pusher = $this->pusher->fresh();
    $this->assertEquals(1, $this->pusher->oos);

    $this->assertCount(2, $this->pusher->inventories, "Pusher doesnt have 2 Inventories");
    $this->assertEquals(0, $this->pusher->latestInventory->tags_blocked);
}

If I comment out the line:

    $this->expectsEvents(\App\Events\InventoryOutOfStock::class);

Then my test will pass. The line:

    $this->assertEquals(1, $this->pusher->oos);

passes and this would only happen if the event fired. Additionally, I looked at my log file and I can guarantee that the event fired....

Is there anything I am doing wrong to tell PHPUnit that these events will be firing???

Thank you!

EventServiceProvider

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        \App\Events\InventoryOutOfStock::class => [
            \App\Listeners\InventoryOutOfStockUpdater::class,
            \App\Listeners\EmailInventoryOutOfStockNotification::class,
            \App\Listeners\SMSInventoryOutOfStockNotification::class,
        ],
    ];

    /**
     * Register any other events for your application.
     *
     * @param  \Illuminate\Contracts\Events\Dispatcher  $events
     * @return void
     */
    public function boot(DispatcherContract $events)
    {
        parent::boot($events);
    }
}

via Chebli Mohamed