How to Accept Payments: Testing Stripe Webhooks : 2nd Test failed?

First test was fine, but why is it failing when

$ phpunit --filter test_it_deactivates_a_users_subscription_if_deleted_on_stripes_end PHPUnit 6.1.3 by Sebastian Bergmann and contributors.

F 1 / 1 (100%)

Time: 200 ms, Memory: 18.00MB

There was 1 failure:

1. Tests\Feature\WebhooksControllerTest::test_it_deactivates_a_users_subscription_if_deleted_on_stripes_end Failed asserting that true is false.

/Users/seb/laravel-projects/laracasts/billing/tests/Feature/WebhooksControllerTest.php:58

<?php

namespace Tests\Feature;

use App\Http\Controllers\WebhooksController;

use Illuminate\Foundation\Testing\DatabaseTransactions;
use Tests\TestCase;

class WebhooksControllerTest extends TestCase
{

    use DatabaseTransactions;

    public function test_it_converts_a_stripe_event_name_to_a_method_name()
    {

        $name = (new WebhooksController)->eventToMethod('customer.subscription.deleted');

        $this->assertEquals('whenCustomerSubscriptionDeleted', $name);
    }

    public function test_it_deactivates_a_users_subscription_if_deleted_on_stripes_end()
       {


    $user = factory('App\User')->create([
        'stripe_active' => 1,
        'stripe_id'     => 'fake_stripe_id'
    ]);

  
    $this->post('stripe/webhook', [
        'type' => 'customer.subscription.deleted',
        'data' => [
            'object' => [
                'customer' => $user->stripe_id
            ]
        ]
    ]);


    $this->assertFalse(!!$user->fresh()->stripe_active); <-- Failed?


}
}