It is difficult to gauge how good Morocco are from a meeting with a side from the smallest country of 24 competing at Afcon 2025 – and in front of their own vociferous fans.
Comoros were unbeaten as they topped their qualifying group ahead of Tunisia and shocked Ghana at the last Afcon two years ago.
However, Morocco beat Comoros 3-1 to top their group at the recent Arab Cup in Qatar before edging Jordan 3-2 after extra-time in Thursday’s final.
That was with a completely different squad than the one that is at their home tournament.
Comoros too only had one player from the Arab Cup starting at Prince Moulay Abdellah Stadium against the hosts.
Even so, it is another indication that Morocco have strength in depth.
This was three points gained without having to call on influential captain Achraf Hakimi, who was only fit for the bench after suffering an ankle injury playing for Paris St-Germain in a Champions League game in early November.
El Kaabi was himself a substitute before the 32-year-old Olympiacos striker made a sensational goalscoring entrance with 25 minutes remaining.
OK, he did not quite rise as high off the ground as McTominay, but it was greeted with similar gasps inside his home stadium.
Morocco’s depth will be tested more in tougher challenges ahead, starting with Mali on Boxing Day and then Zambia on 29 December.
They will, though, be favourites to qualify from Group A as the look to win Afcon for the first time since 1976 or at least reach the final for the first time in 21 years.
Plenty more time for Clarke to judge the strengths and weaknesses of the side Scotland will face at the Gillette Stadium in Foxborough, USA on 19 June.