Comment 28 for bug 2017101

I'd expect the Test Plan for updates to virtualbox to follow / include the tests listed at the virtualbox updates wiki page e.g.:

Start a windows VM (generally w10, or w11).
Update the guest additions from iso pack inside the VM.
Reboot the VM.
Check if the VM starts correctly and the acceleration works.
Start a linux VM (generally ubuntu LTS or Debian stable).
Update the guest additions from iso pack inside the VM.
Reboot the VM.
Check if the VM starts correctly and the acceleration works.
Remove guest additions and install the virtualbox-guest-x11 package (linux only).
Check if vboxdrv is correctly built, check if *.ko modules are built on the target linux VM.
Install virtualbox inside the VM and check if it can start correctly.