Unsupported function tested in test case VNFLifecycleManagementAPI Subscriptions SOL003 v2.6.1

According to the specicfication file, the parameters supported by the GET method on subscriptions are filter and nextpage_opaque_marker.
However, the attribute selector like exclude_fileds,exlude_default is also tested in Subscriptions tests.
Test cases are GET subscriptions with all_fields attribute selector, GET subscriptions with exclude_default attribute selector,GET subscriptions with fields attribute selector,GET subscriptions with exclude_fields attribute selector.

Is this part missing in the specification file or the test cases should be removed?

https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/003/02.06.01_60/gs_NFV-SOL003v020601p.pdf (Table 5.4.18.3.2-1: URI query parameters supported by the GET method on this resource)