I'd say it depends...
I don't believe that the purpose of a SELCAL check, i.e. to **guarantee** that an aircraft is reachable *at all times* via SELCAL, but rather to ensure that if there is a equipment or reception problem, it becomes known at a time when the aircrew is speaking to the operator when current conditions are apparent to both and equipment tuning can be made to troubleshoot issues or new frequencies assigned in case of poor enough reception.