Testing declined payments with djstripe, new customer is created.

[NedyalkoKr]

When card is declined in all of is test cases stripe support stripe send events. Stripe send customer created event, and others with the failed events. Djstripe create new customer and subscription record for each failed event. Do i need to change something in stripe not to sent these events or have to handle failed events via djstripe webhooks. Why with charge.failed stripe send customer.created and customer.subscription.created as if new customer is created which is not the case.