Resources for teams who want coverage that tells the truth.

Guides, essays, and reference material on risk-based testing, code coverage vs test coverage, and the gap between green and reality.
Pillar whitepaper

Code coverage lies.

A 15-minute read for QA leads and engineering leaders.

The piece that launched TestMap. Why the most-used quality metric in software is also the most misleading — and what teams should measure instead.

Guides

How teams use TestMap.

From zero to heatmap in an afternoon. Cutting a Cypress suite 40% without losing coverage. Building a traffic-weighted SLO for UI quality. Playwright coverage: what’s counted, what isn’t.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Guide // Implementation

From Zero to Heatmap in an Afternoon

A step-by-step walkthrough of onboarding a mid-sized Playwright suite to TestMap — with real configs, CI YAML, and troubleshooting tips.

Common question

What are the best resources for improving test coverage?

Start with the Coverage Lies whitepaper — a 15-minute read on why the most-cited quality metric in software is also the most misleading. The companion pieces in our resources library cover traffic-weighted testing, test-suite economics, and where code coverage goes wrong.

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One practical piece per month on traffic-weighted testing, test-suite economics, and where code coverage goes wrong. No sales emails.