Production Testing

QA Strategy

Shift-Right Testing: How to Test in Production Without Breaking Things

"Testing in production" used to be an insult — shorthand for teams that didn't test at all and used their users as beta testers. Today it's a deliberate strategy used by some of the most reliable engineering organizations in the world. The distinction is important:

Testing

Shadow Testing: Mirroring Production Traffic for Safe Testing

Shadow testing (also called traffic mirroring or dark launching) sends a copy of real production requests to a new version of your service alongside the production version. The new version handles the request but its response is discarded — users only see the response from the stable version. This lets you