The test suite should run based on the default settings for the user profile in regards to the unmanaged attribute policy. That might cause failures in some tests where custom attributes are being used and new realms are being created.
We should also remove the tests we currently have for user profile that are basically extending a specific test class based on the static/current user profile because they are no longer needed. For instance, https://github.com/keycloak/keycloak/blob/main/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/forms/RegisterWithUserProfileTest.java.