As long as it is only doing this once per day, this is normal. You can set the time of the Daily Reset by going to:
Menu > Settings > Power > Daily Reset Time
Whatever hour you select, the System Test will occur at around 35 minutes past the hour. If you see the System Test occur at any other time of the day, then that may be a sign of a problem.
I love how it lays in wait for you to wake the unit before it does what could easily and has been done on its own in the past. Maybe D!SH should take over Apples abandoned "Cat" naming protocols and change it from the Hopper to something that would jump out at you. Mine would be "The Rattler", since it's so noisy also.
I had a similar experience with the Wally. All this year, it seemed like it would never update the guide on its own after the Daily Reset, no matter how long I left it in standby. I would always have to wake up the unit, and then put it back into standby before it would do a guide download.