Minimal failing example for puppeteer/puppeteer#7475

Steps:

Host a small webpage that loads a web font

cd serve
npm install
npm run serve

Run puppeteer test script in a separate terminal

cd test
npm install
npm run test

It fails

> test@1.0.0 test
> node test.js

/home/dolf/tmp/puppeteer-issue-7475-reproduction/test/test.js:38
          new Error(
          ^

Error: After 1000ms, there are still 2 pending items.
    at Timeout.fail [as _onTimeout] (/home/dolf/tmp/puppeteer-issue-7475-reproduction/test/test.js:38:11)
    at listOnTimeout (node:internal/timers:559:17)
    at processTimers (node:internal/timers:502:7)

When did it break?

If you downgrade to puppeteer v9, it works without errors.

cd test
npm add puppeteer@^9
npm run test