How to set the amount to trigger error ‘payment declined’?

Hi - I’m trying to do negative testing for PayPal

You can force two types of API errors: those related to the transaction amount , and those not related to the amount.

  • To trigger an error condition on an amount-related field, specify a error code value as a number with two digits to the right of the decimal point. For example, specify a value of 107.55 to trigger the 10755 error.
  • To trigger errors on fields that are not amount related, specify the error code in whole. For example, use a value of 10539 to trigger a “payment declined” error.

How to set the amount to trigger error ‘payment declined’ in magento 2. Negative Testing is On for sandbox business account.