GPStest is supposed to be a simple app that lets you see what the GPS system is doing. The latest “What’s new?” says “Background execution - You can now log on to your device while you do something else!”
This is suspicious. There is no need for GPSTest tor run in background, ever. Did someone put malware into it?
My point is that any increase in privilege by a working app is suspicious. Especially one that turns on a capability not really needed for core functionality.