Locally the tests run against the dev server. Playwright will either start the dev server or reuse an already running instance if there is one on the configured port.

In CI the tests run against the production server. We use turbo.json to first build and then start the server.

The test applications are not deployed anywhere to keep the action fast.

Ports

The port of each application indicates the Next.js version

next-15 runs on 4015
next-16 runs on 4016
sveltekit runs on 5173

Developing locally

If you want to write or debug e2e tests for a specific Next.js version you can

Terminal 1

pnpm next-16

Terminal 2

cd tests/next-16
pnpm playwright test or pnpm playwright test --ui