I built WildFly locally with Hibernate 5.4.22.Final and ran the Jakarta EE 8 Platform TCK, the only failure that I see is:
The test source for Jakarta EE 9 Platform TCK is at https://github.com/eclipse-ee4j/jakartaee-tck/blob/master/src/com/sun/ts/tests/jpa/core/criteriaapi/CriteriaBuilder/Client.java#L7436 (I'm not sure of how to easily get a link to the source for the same test for EE 8 which is just tagged but not branched).
Note that the JPA 2.2 Standalone TCK is downloadable from https://download.eclipse.org/jakartaee/persistence/2.2/eclipse-persistence-tck-2.2.0.zip and should work with the same configuration settings as we previously used with running the JPA 2.1 TCK.
Thanks for the quick fix, I verified that the Jakarta EE 8 Platform TCK Persistence tests are passing now!
Thanks for verifying it.