Testing
Pa11y is a command-line accessibility testing tool built on top of HTML CodeSniffer. It's lighter than full browser automation frameworks, integrates naturally with any CI/CD pipeline, and supports running accessibility checks against URLs without requiring a test framework. This guide covers installation, configuration, CI integration, and
Testing
Accessibility bugs are cheap to fix when caught during development and expensive to fix in production. Automated accessibility testing with axe-core and Playwright catches a significant portion of WCAG violations without manual effort — and it fits neatly into any CI pipeline. This guide walks through everything from installation to
Testing
Automated accessibility testing gives you speed and consistency. Run it on every PR and you'll catch the class of violations that tools can reliably detect — missing labels, contrast failures, invalid ARIA — before they reach production. The key is understanding what each tool covers, how to integrate it into
Testing
Most teams use axe-core with default settings: run it against a page, count violations, fail the build. That works until your design system produces dozens of false positives, or your app has accessibility requirements that no default rule covers. This guide covers the axe-core internals you need to
Testing
Lighthouse catches a useful set of SEO and accessibility issues, but it misses a lot. This guide covers the tools and techniques that go deeper: axe-core for WCAG compliance, Pa11y for CI integration, custom Playwright assertions for your specific patterns, and how to combine them into a coherent automated
Testing
Automated accessibility testing tools scan web pages and applications for WCAG violations without manual review. They're fast, free, and catch the most common issues — but industry studies put real-world coverage around 30-40% of WCAG violations. This guide compares the major tools, explains what each catches, and
Usability Testing
WCAG compliance and accessible usability are not the same thing. A product can pass automated accessibility checks and still be unusable by screen reader users, people with cognitive disabilities, or users with motor impairments. Accessibility usability testing closes that gap: testing with real assistive technology users to find the problems
Testing
Getting accessibility testing into your CI/CD pipeline is the difference between accessibility that holds over time and accessibility that degrades with each release. Without pipeline integration, you rely on developers remembering to run checks manually — and that doesn't scale. This guide covers the complete picture: jest-axe
Testing
Integrating accessibility testing into CI/CD means every code change is automatically checked for WCAG violations before it reaches production. This prevents accessibility regressions — where a change that broke accessible behavior slips through unnoticed. This guide covers how to set up automated accessibility checks in GitHub Actions, what tools to
Testing
Screen reader testing is one of the most direct ways to verify that your application is accessible to blind and low-vision users. Unlike automated tools, screen reader testing reveals the actual user experience: what gets announced, in what order, and whether it makes sense. This guide covers how to
Testing
axe-core is the accessibility testing engine behind Deque's browser extensions, most CI accessibility tools, and the built-in accessibility checks in browser DevTools. Understanding how to use it directly gives you more control over what you test, what you suppress, and how violations surface in your build
Testing
Playwright's browser automation and axe-core's accessibility engine are a natural pairing. Playwright handles navigation, interaction, and state management. axe-core scans the DOM for WCAG violations. Together, they let you run accessibility checks at the same time as your functional tests — or in a dedicated