faultline

The testing lab

QA challenges

Hands-on audits across live banking, crypto, trading and commerce builds. Every challenge has a hidden answer key, deterministic scoring, and evidence tracking.

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4 live sites

Showing 1–12 of 24 challenges

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Live scenarioMediumNorthstar SupplyCommerce

Checkout & Cart Audit - Level 1

Audit a live storefront's cart, promotions, and checkout flow. Find the five faults hiding in plain sight.

Start audit
25 min timebox5 injected faults500 points availablePreview build
NS

Catalogue, smart cart, promotions and responsive checkout, wired with deterministic data-testid hooks. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumNorthstar SupplyCommerce

Cart Integrity & Search - Level 2

Stress the cart's inventory and discovery controls. The catalogue looks calm until quantities and filters meet edge cases.

Start audit
20 min timebox5 injected faults500 points availablePreview build
NS

Catalogue, smart cart, promotions and responsive checkout, wired with deterministic data-testid hooks. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumNorthstar SupplyCommerce

Promotions & Delivery - Level 3

A promotion and delivery audit. Verify that every discount and delivery promise survives the full cart journey.

Start audit
20 min timebox5 injected faults500 points availablePreview build
NS

Catalogue, smart cart, promotions and responsive checkout, wired with deterministic data-testid hooks. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioHardNorthstar SupplyCommerce

Checkout Reliability - Level 4

The final audit. Combine edge-case quantities, delivery calculations, stock limits, and a hostile checkout to find what slips through.

Start audit
25 min timebox5 injected faults500 points availablePreview build
NS

Catalogue, smart cart, promotions and responsive checkout, wired with deterministic data-testid hooks. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumNorthstar SupplyCommerce

Mobile Checkout & Search - Level 5

A narrow-viewport audit that combines search filters, cart edge cases, delivery pricing and touch-sized checkout actions.

Start audit
20 min timebox5 injected faults500 points availablePreview build
NS

Catalogue, smart cart, promotions and responsive checkout, wired with deterministic data-testid hooks. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumMeridian BankFintech

Transfer & Balance Audit - Level 1

Audit Meridian Bank's transfer journey. Verify amounts, balances, duplicate submissions and the confirmation state.

Start audit
25 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumMeridian BankFintech

Payee Integrity & Limits - Level 2

Payees, transfer limits and statement filters. Check that the bank validates the destination before it moves money.

Start audit
20 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumMeridian BankFintech

Statements & Fees Audit - Level 3

Reconcile statements, transfer fees and rounding. The ledger must agree with every displayed total.

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25 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioHardMeridian BankFintech

Limits & Fees - Level 4

A hard audit of transfer limits, fee handling, negative amounts and failure states under retry pressure.

Start audit
25 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumMeridian BankFintech

Profile & Alerts Audit - Level 5

Profile validation, alert preferences, payees and mobile transfer actions — the account settings that quietly affect payments.

Start audit
20 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumMeridian BankFintech

Alerts, Profile & Statements - Level 6

A settings-heavy audit: alert persistence, profile validation, statement filters, responsive actions and receipt accuracy.

Start audit
20 min timebox5 injected faults500 points availablePreview build
MB

Balance cards, a three-step transfer wizard, payee management, statements and alert preferences. Wired with deterministic data-testid hooks.

Automation-ready
Live scenarioMediumChainVaultFintech

Wallet & Swap Audit - Level 1

Audit ChainVault's portfolio and swap journey. Verify amounts, balances, fees and the confirmation state.

Start audit
25 min timebox5 injected faults500 points availablePreview build
C

Portfolio balances, live swap quotes, network fees, slippage controls, activity history and security settings. Wired with deterministic data-testid hooks.

Automation-ready