Pre-launch checkout QA: twelve common breaks to test

Short answer: Test coupons, shipping, tax, emails, and refunds across devices—twelve focused cases catch most launch disasters.

Use real small transactions where possible; staging gateways miss edge cases.

High-value tests

• Guest and account checkout paths.
• International or rural shipping if offered.
• Inventory edge: last item, backorder messaging.
• Payment failure and retry UX.

Post-purchase

Emails, account order history, and analytics events should align.

Rollback

Feature-flag risky modules; keep maintenance page ready if payments misbehave.

Frequently asked questions