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How I Use Playwright to Catch Broken Routes Before Deploying

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Throughout the past month, I’ve been building a free guitar-learning site with interactive tools and blogs among other things. At present, it has hundreds of routes, and I needed something to test the pages before deploying.

So I added a small Playwright workflow. It checks every route in the sitemap, opens some pages in a browser, and runs after the production build to catch any issues.

I think I’d need more than 7 tests to claim it catches all issues, but it’s quite useful for obvious deployment issues.

Why I decided to add Playwright

Generated 22 documents in .contentlayer✓ Creating an optimized production build✓ Compiled successfully✓ Collecting page data✓ Generating static pages (284/284)Build error occurredError: ENOENT: no such file or directory, rename'C:\Users\pc\Code\tonerune\.next\export\newsletter\2026-q3.html'-> 'C:\Users\pc\Code\tonerune\.next\server\pages\newsletter\2026-q3.html'

I was greeted by this interesting build failure. Hmm.. the route was generating both original slug and lowercase version.

The dynamic route was also deliberately generating both...

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