Deprecation: #83511 - Deprecate AbstractValidatorTestcase 

See forge#83511

Description 

The class AbstractValidatorTestcase has been marked as deprecated and will be removed in CMS 10.

Impact 

Test cases for validators that extend that class will no longer work.

Affected Installations 

All installations that make use of that class

Migration 

Put the logic of that test case into your own test cases.