Many years ago, when I was still an innocent spotter at Antwerp EBAW, a VLM F50 was test flying after repairs/maintenance to the landing gear. Something must have been less than perfect, still, at one time the crew requested a low pass for visual inspection of the nose gear. And the pilot insisted "Antwerp tower, we are NOT declaring an emergency" - apparently she knew the tower crew and their habits. It didn't change the fact that, by the time they landed, the runway was lined not only with the full extent of the airport fire brigade but on top of that with several engines of the nearby municipal brigades. All of them sincerely grateful, I don't doubt, for a bit of "real world" practice.