tos 2.06 and memory test at bootup

Hello all, i use from time to time, when experimenting the tos 2.06 using seltos(a program that loads the tos into ram and can survice reboots. I noticed that it boots ok and shows the atari logo, but i recall from emulation, that tos 2.06 showed also a memory test with the logo. Could be possible that neing it loaded into ram, the memory test isn't loaded?. Also, i notice on the tv-monitor and with the hi-res vga monitor, a subtle flicker, that don't appear when booting using its own tos(1.62).
Anyone have a clue?.
Thanks in advance!!!!