It's really an autoland [A/L] training maneuver in VMC conditions, so it doesn't necessarily have to be to a full CAT-II/III standard at a CAT-II/III airport.
A/L can be performed at CAT-I airports. But be aware that the ILS signal is less precise; the radar altitude may not conform to CAT-II/III terrain standards; the airplane may not touch down on centerline, and there is no assured rollout guidance.
You're checking to see if the airplane can still land itself somewhere on the pavement in Dual or Triple mode [2 or 3 A/Ps]