Stripe Subscription Expired

I have setup webhook in stripe to test failed payments using laravel cashier as documented in laravel https://laravel.com/docs/5.5/billing#handling-stripe-webhooks (bypassed the CASHIER_ENV === 'testing' mode ) but seemed to be customer.subscription.deleted event is not fired after trail period end of the subscription .(manually triggered subscription trail_end) also followed the instructions in this tutorial http://benfoster.io/blog/stripe-failed-payments-how-to, is there something extra I have to configure?