# Tests debugging of HTML5 Workers

1. Open DevTools, Scripts Panel; Tick Debug on Workers sidebar.
2. Reload the page.
4. Observe 2 workers appear in the worker sidebar pane (including non-existent-worker.js)"
5. Observe worker-primes.js and primes.js appear in scripts drop-down box.
6. Assure primes are being logged to test console below.
7. Set a breakpoint on one of worker scripts, assure it's hit.
8. Try causing an error in worker, observe it's logged in DevTools console and in test console below.