Interesting...never noticed anything like that (wasn't looking for it either). Emissions evap tests run when the car is sitting there parked, 'off', doing nothing. I'm sure there are other things going on as well. Is there some sort of aftermarket gadget installed like an alarm or remote-start?
Nothing electronic now days is ever completely OFF. Unless you have a manually operated battery disconnect switch that is...
2010 Kizashi GTS, CVT, iAWD (3/10 build date)
2011 SX4 Premium Hatch, CVT, iAWD (12/10 build date)
2018 Mazda CX-5 iAWD Touring
2014 Wrangler JKUW (GONE, traded
1991 Samurai, 5-Speed, EFI, Soft-Top (