Okay, after digging a bit deeper I have come up with the following list of affected tests: org.hibernate.beanvalidation.tck.tests.metadata.PropertyDescriptorTest: #testGetGroupConversionsForField #testGetGroupConversionsForProperty #testGetGroupConversionsReturnsEmptySet #testIsCascaded #testPropertyName org.hibernate.beanvalidation.tck.tests.metadata.ConstraintDescriptorTest: #testAnnotationAndMapParametersReflectParameterOverriding #testComposingConstraints #testComposingConstraintsPayload #testGetGroups #testGetGroupsOnInterface #testGetGroupsWithImplicitGroup #testGetMessageTemplate #testGetValidationAppliesTo #testGetValidationAppliesToFromComposingConstraint #testGetValidationAppliesToReturnsNull #testPayload #testReportAsSingleViolation org.hibernate.beanvalidation.tck.tests.metadata.BeanDescriptorTest: #testGetConstraintsForUnConstrainedProperty #testGetElementClassReturnsBeanClass #testIsBeanConstrainedDueToConstraintOnInterface #testIsBeanConstrainedDueToValidAnnotation These tests have in common the fact that they use bean classes derived from the org.hibernate.beanvalidation.tck.tests.metadata.Person interface, whose #getAge() method declares @CustomConstraint, which inherits @Size as a composing constraint via @CustomComposingConstraint. Section 3.3 of the spec says: The type upon which composed constraint is placed must be compatible with all constraints (composing and composed). I therefore conclude that the constraint applied to Person#getAge() is incorrectly composed. Thanks, Matt *CONFIDENTIALITY NOTICE: This e-mail, including any attachments, may contain confidential, privileged and/or proprietary information which is solely for the use of the intended recipient(s). Any review, use, disclosure or retention by others is strictly prohibited. If you are not an intended recipient, please contact the sender and delete this e-mail, any attachments and all copies.* Permanent General Assurance Corporation | Permanent General Assurance Corporation of Ohio | The General Automobile Insurance Company, Inc. | Old American County Mutual Fire Insurance Company | Home Office: 2636 Elm Hill Pike, Nashville, TN 37214 On Fri, Mar 23, 2018, 3:35 AM Guillaume Smet <guillaume.smet(a)gmail.com&gt; wrote: