My app has background work: queued jobs, scheduled tasks, or cron jobs (emails, cleanups, syncs, report generation). I want tests proving they work, because they fail silently by design. First, inventory the background work: every job type, what triggers it, what it's supposed to do, and what happens today if it throws an error. Then write tests covering: 1. Each job does its actual work: enqueue it (or invoke it directly with fixture data) and assert the expected end state in the database or the mocked external service. 2. Failure handling: make the job throw and assert what happens. Does it retry? Does the failure get logged somewhere visible? Does a poison job block everything behind it in the queue? 3. Retry safety: if a job runs twice (retry after partial completion), the result is still correct, not doubled. 4. Scheduled jobs: verify each cron or scheduled task is registered with the schedule I expect, and that its logic runs correctly when invoked. Also flag any job with no failure visibility. A job that fails silently forever is worse than no job, because I believe work is happening that isn't. When finished, run the suite and give me the job inventory with per-job status: tested, retry behavior verified, and failure visibility (or its absence).