Why doesn't the @PreRemove annotation work for me?

Question

Java

I write integration tests for services with an in-memory base ( h2). Services do not contain any logic and simply call similar methods from the DAO. Services also have annotations @Transactional(at the class level). Methods for reading in services are annotated with @Transactional(readOnly = true). Now I'm testing a service for working with a directory. The directory entity itself is marked with annotations: @Entity, @Immutable, @EntityListeners(PreventAnyUpdate.class).

public class PreventAnyUpdate {
    @PrePersist
    void onPrePersist(Object o) {
        throw new RuntimeException("Can't create Entity!");
    }

    @PreRemove
    void onPreRemove(Object o) {
        throw new RuntimeException("Can't delete Entity");
    }
}

All tests pass, except for tests for delete(). Should throw an exception, but does not throw, but deletes everything normally (which it should not do at all). What's wrong?