Regression Test
After changing tax rules, rerun payment, coupons, and order confirmation as well as the new rule to ensure working checkout was not broken.
shop.local/checkout/order-778BaselineOrder checkout
↳Keep the pre-change baseline so later differences can be separated into intended changes and regressions.
Find old cases from the impact surface: Because tax participates in order total, rerun coupons, payment amount, and confirmation—not merely the new rate. Scope comes from data and flow connections, not mechanically rerunning everything.
Use prior expectations to catch surprises: A checkout that used to complete, an amount that used to be correct, or an old clear error that changes after this edit is a regression worth addressing. Compare results before and after.
You can say this to an AI Agent
After changing tax and coupon rules, run regression by impact: retest existing coupons, payment totals, and order confirmation. Do not only report the new rule passing; list the actual result for each older path.
Select page elements for precise AI edits
Click a button, text, or card, note the change, then copy its exact location to AI.
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