Hello how can I override Odoo general test

@tagged('post_install', '-at_install')
class TestPayment(AccountingTestCase):

this is not working.

import addons.account.tests.test_payment
from addons.account.tests.account_test_classes import AccountingTestCase
from odoo.tests import tagged


@tagged('post_install', '-at_install')
class TestPayment(AccountingTestCase):
    def test_full_payment_process(self):
        pass

addons.account.tests.test_payment.TestPayment = TestPayment