Playwright webServer preflight

Catch webServer and baseURL drift before E2E tests hang.

Paste a sanitized Playwright config and the URL your test expects. The checker compares server URL, baseURL, port, timeout, and local/CI reuse behavior without running Playwright or touching your repo.

Static config diffNo test executionSafe copy report

Test server config

No repo access

Run contextExpected test URLplaywright.config snippet

Do not paste tokens, private repository code, CI logs, or secret environment values. This page checks static Playwright config fields only.

fail

Server result

fail

The pasted Playwright config has likely webServer/baseURL blockers.

Findings3

Failures2

Warnings1

ContextCI

fail

webServer.url port does not match expected test URL

webServer.url points at port 3000, while expected test URL points at port 4173.

warn

webServer.timeout is short

CI cold starts often need at least 60000ms. Shorter timeouts can create flaky server startup failures.

fail

reuseExistingServer is true in CI

CI usually starts from a clean machine. Prefer reuseExistingServer: !process.env.CI so local runs can reuse a server but CI starts one.

Parsed fields

webServer: detectedurl: http://localhost:3000baseURL: http://localhost:3000timeout: 30000reuse: true

Safe report

Playwright webServer/baseURL preflight
Status: fail
Summary: The pasted Playwright config has likely webServer/baseURL blockers.

Parsed config:
- webServer detected: yes
- command: npm run preview
- webServer.url: http://localhost:3000
- use.baseURL: http://localhost:3000
- expected test URL: http://localhost:4173/dashboard
- timeout: 30000
- reuseExistingServer: true

Findings:
- fail: webServer.url port does not match expected test URL - webServer.url points at port 3000, while expected test URL points at port 4173.
- warn: webServer.timeout is short - CI cold starts often need at least 60000ms. Shorter timeouts can create flaky server startup failures.
- fail: reuseExistingServer is true in CI - CI usually starts from a clean machine. Prefer reuseExistingServer: !process.env.CI so local runs can reuse a server but CI starts one.

Checklist:
- Make webServer.url and use.baseURL point to the same protocol, host, and port.
- Use reuseExistingServer: !process.env.CI for the common local/CI split.
- Add an explicit timeout for slow CI server startup.
- Run the real Playwright suite after this static preflight.

What this checks

It checks static Playwright config fields for server URL, baseURL, port, timeout, reuseExistingServer, and local-vs-CI mismatch risk.

What this does not do

It does not run Playwright, start a server, inspect your repository, install dependencies, or prove that a browser test is correct.