Todo: Look at whether these test fails mean anything
Somewhere in their flow, they call CRM_Core_Form::getAuthenticatedCheckSumContactID and it calls CRM_Core_Form::getRequestedContactID which returns null. Should it be null or the correct contact id?
This maybe qualifies as a regression but at the moment I don't have a specific bug. It came up in the context of https://github.com/civicrm/civicrm-core/pull/28128 where they all fail if validateAuthenticatedCheckSumContactID() is expecting not null.
api_v3_ContributionPageTest.testValidate
api_v3_ContributionPageTest.testValidatePost
api_v3_ContributionPageTest.testValidateOutputOnMissingRecurFields
CRM_Contribute_Form_Contribution_ConfirmTest.testPayNowPayment
CRM_Contribute_Form_Contribution_ConfirmTest.testSeparatePaymentConfirm
CRM_Contribute_Form_Contribution_MainTest.testSetRecurFunction
CRM_Contribute_Form_Contribution_MainTest.testSetRecurFunctionOptionalYes
CRM_Contribute_Form_Contribution_MainTest.testSetRecurFunctionOptionalNo
CRM_Contribute_Form_Contribution_MainTest.testSetRecurFunctionNotAvailable
CRM_Contribute_Form_Contribution_MainTest.testExpiredPriceSet
CRM_Contribute_Form_ContributionTest.testContributionBasePreProcess
CRM_Core_FormTest.testGetAuthenticatedUser
CRM_Event_Form_Registration_ConfirmTest.testSubmit
CRM_Event_Form_Registration_ConfirmTest.testWaitlistRegistrationContactIDParam
CRM_Event_Form_Registration_ConfirmTest.testTaxMultipleParticipant
CRM_Event_Form_Registration_ConfirmTest.testMailMultipleParticipant
CRM_Event_Form_Registration_ConfirmTest.testOnlineRegNoPrice
CRM_Event_Form_Registration_ConfirmTest.testSubmitNonPrimaryEmail
CRM_Event_Form_Registration_ConfirmTest.testRegistrationWithoutCiviContributeEnabled
CRM_Event_Form_Registration_ConfirmTest.testPaidSubmit with data set #0
CRM_Event_Form_Registration_ConfirmTest.testPaidSubmit with data set #1
CRM_Event_Form_ParticipantTest.testTransferParticipantRegistration
CRM_Event_Form_SelfSvcTransferTest.testCancel
CRM_Event_Form_Registration_ConfirmTest.testNoteSubmission