7 files declare their use of Payment in Commerce Core 8.2

DefaultPaymentAdminTest.php in modules/payment/tests/src/Functional/DefaultPaymentAdminTest.php

ManualPaymentAdminTest.php in modules/payment/tests/src/Functional/ManualPaymentAdminTest.php

OrderPaidSubscriberTest.php in modules/payment/tests/src/Kernel/OrderPaidSubscriberTest.php

PaymentAccessTest.php in modules/payment/tests/src/Kernel/PaymentAccessTest.php

PaymentCheckoutTest.php in modules/payment/tests/src/FunctionalJavascript/PaymentCheckoutTest.php

PaymentOrderUpdaterTest.php in modules/payment/tests/src/Kernel/PaymentOrderUpdaterTest.php

PaymentTest.php in modules/payment/tests/src/Kernel/Entity/PaymentTest.php