Hi @Guillaume I've attached a zip-d up test case to repro this error; there are 2 alternative pom files

• pom.xml runs the test with hibernate validator 6.0.8.Final and will fail because the expected constraint violiation on the subclass defined in the XML is not fired.
• pom-HV-4.3.2.xml runs the test successfully (using hibernate validator 4.3.2.Final)

I think the problem was introduced with version 5 of the validator - I couldn't get the test to run successfully with anything later than 4.3.2.

Hope this helps,

Alan