A green backup job proves that data was written somewhere. It does not prove that the right data was selected, the archive is readable, credentials are available, or the service will start after recovery.
That distinction matters most in a homelab, where backup systems are often built once and then trusted silently. A renamed datastore, an excluded mount point, or an encryption key stored only inside the failed environment can turn months of successful jobs into an unpleasant surprise.
Run a small restore test on a schedule. Pick one representative VM or container, restore it under a temporary ID, and connect it to an isolated network. Confirm that it boots, that expected files exist, and that the application reaches a usable state. For a database, perform an application-level check rather than merely seeing that the service process is running.
Record four facts while the test is fresh: where the backup lives, which credentials or keys are required, how long the restore took, and what manual steps were missing from the runbook. Delete the temporary guest only after the result has been documented.
Rotate the target instead of restoring the easiest machine every time. One month test a stateless utility, the next a database, and later a service with an external dependency. This gradually exercises storage, networking, secrets, and application recovery without requiring a full disaster simulation on every maintenance day.
The first restore drill is rarely elegant. That is its value. It converts an assumption into evidence and reveals the next improvement while the original system is still healthy.