I'm pretty sure they want it to be labeled as fan art so the public isn't aware its their art test, so putting both fan art and art test kind of defeats the purpose. I would air on the side of caution and remove anything indicating it is an art test for Massive from the image.
they might want it labeled as fan art so no one makes the mistake of these being leaked images from the actual game and it blowing up over the internet. art test turned out great! i like the presentation of it all, with the very simple stand in buildings in the background, really helps ground the piece. nice work, sorry…