QA Lab
Bug Arena
AvailablePractise finding bugs, safely.
Investigate purpose-built training applications with defects planted on purpose, write clear reports, and learn from each explained solution — never on real systems.
- 01Pick a missionRead the brief and the expected behaviour.
- 02InvestigateUse the training app like a customer and compare it with the rules.
- 03ReportWrite a clear report. It is checked against what you did in the app.
Two ways to play
Practice
Play anonymously. Progress, hints and solutions stay in this browser. Practice never counts toward rankings.
Ranked
Sign in with a verified account. The training app runs on our server, reports are checked against what you did there, and your best result per mission can appear on the leaderboard.
Choose a mission
Each mission is a small purpose-built application with exactly five defects planted on purpose. Play it in Practice in your browser, or in Ranked with a verified account.
Commerce Challenge
AvailableDifficulty: Introductory · 5 seeded defects
Explore a small online shop — catalogue, cart, promotion codes and checkout — and report the defects planted in it.
- Filters and search
- Totals and discounts
- Form validation
Payment Journeys
AvailableDifficulty: Intermediate · 5 seeded defects
Send transfers in a simulated payment app with synthetic money, control the bank’s responses, and check fees, balances and status changes when steps fail, repeat or arrive late.
- Payment states
- Repeated submissions
- Boundary values
Arabic & RTL Challenge
AvailableDifficulty: Intermediate · 5 seeded defects
Review a bilingual customer portal in Arabic and English for mirroring, clipped labels, mixed-direction numbers and codes, language switching and missing translations.
- Mirrored layouts
- Mixed-direction text
- Language switching
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