Works in Staging

ELI5 — The Vibe Check

Works in staging is the sequel to 'works on my machine.' The code passed every test in the staging environment but immediately catches fire in production. Different environment variables, different data volume, different traffic patterns — turns out staging is just production cosplay. The staging fairy tale has a sad ending: an incident postmortem.

Real Talk

"Works in staging" describes the common situation where software functions correctly in pre-production environments but fails in production due to environmental differences — data volume, configuration, network topology, traffic patterns, third-party service behavior, or race conditions that only manifest under real load. It's a key argument for production observability, canary deployments, and realistic staging environments.

When You'll Hear This

"It works in staging!' has become a meme on our team." / "Our staging environment has 100 rows. Production has 50 million. Of course it works in staging."