Intermittent test failure: test.close.js-http test unref for coverage

[alxndrsn]

https://github.com/pouchdb/pouchdb/actions/runs/5316742697/jobs/9626593871#step:4:1035

  1) test.close.js-http test unref for coverage:
     Error: Timeout of 50000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
      at listOnTimeout (internal/timers.js:557:17)
      at processTimers (internal/timers.js:500:7)

  2)  "after each" hook for "test unref for coverage":
     ReferenceError: PromiseRejectionEvent is not defined
      at Context.<anonymous> (tests/integration/test.setup_global_hooks.js:18:33)
      at processImmediate (internal/timers.js:464:21)

https://github.com/pouchdb/pouchdb/actions/runs/5316742697/jobs/9626597098#step:4:1035

   1) test.close.js-http test unref for coverage:
     Error: Timeout of 50000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
      at listOnTimeout (internal/timers.js:557:17)
      at processTimers (internal/timers.js:500:7)

  2)  "after each" hook for "test unref for coverage":
     ReferenceError: PromiseRejectionEvent is not defined
      at Context.<anonymous> (tests/integration/test.setup_global_hooks.js:18:33)
      at processImmediate (internal/timers.js:464:21)

[alxndrsn]

Ref #8687

[alxndrsn]

The second failure, ReferenceError: PromiseRejectionEvent is not defined, should now be resolved by #8686.

[alxndrsn]

Closing as ancient. Open new issues if there are intermittent failures in the test suite.