# Automated testing — Web Accessibility (A11y)

Source: https://www.skillbyai.com/en/accessibility/a11y-testing-automated

> Find accessibility issues early with axe, Lighthouse, pa11y and jest-axe, and understand what automation misses.

## Popular tools

**axe DevTools**: browser extension. **Wave**: visual feedback. **Lighthouse**: Chrome built-in. **pa11y**: CLI tool. **jest-axe**: React testing. **Accessibility Insights**: Microsoft's comprehensive tool.

## jest-axe example

Automate accessibility checks in your test suite.

```javascript
import { axe, toHaveNoViolations } from 'jest-axe';
expect.extend(toHaveNoViolations);

test('Button is accessible', async () => {
  const { container } = render(
    <button aria-label="Submit">Submit</button>
  );
  const results = await axe(container);
  expect(results).toHaveNoViolations();
});
```

## Limitations of automated testing

Tools find ~30% of issues. Manual testing and real user testing catch the rest. Use automated tests as a first pass, not final verification.