Magento 2 Test braintree card details

I need to trigger transaction decline or any other failed payments in my sandbox but I’m enable to do so.
I’ve used this details ref:https://developers.braintreepayments.com/reference/general/testing/ruby#test-value-4000111111111115

more specifically : 4000111111111115

But still process the payment and no error transaction declined message.

Any suggestion please!