$ mocha --loader=testdouble my/test
(node:43) ExperimentalWarning: Custom ESM Loaders is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:43) DeprecationWarning: Obsolete loader hook(s) supplied and will be ignored: getFormat, getSource
  connection handling
    1) "before each" hook for "connects"
    2) "after each" hook for "connects"
  0 passing (680ms)
  2 failing
  1) "before each" hook for "connects":
     Error [ERR_LOADER_CHAIN_INCOMPLETE]: "testdouble 'load'" did not call the next hook in its chain and did not explicitly signal a short circuit. If this is intentional, include `shortCircuit: true` in the hook's return.
      at new NodeError (node:internal/errors:387:5)
      at ESMLoader.load (node:internal/modules/esm/loader:624:13)
      at async ESMLoader.moduleProvider (node:internal/modules/esm/loader:472:11)
      at async link (node:internal/modules/esm/module_job:67:21)
  2) "after each" hook for "connects":
     TypeError: Failed to execute 'removeChild' on 'Node': parameter 1 is not of type 'Node'.
      at Object.convert (node_modules/jsdom/lib/jsdom/living/generated/Node.js:749:11)
      at HTMLBodyElement.removeChild (node_modules/jsdom/lib/jsdom/living/generated/Node.js:323:29)
      at Context.<anonymous> (file:///builds/cemetech/7/sax/frontend/test/ui.test.mjs:26:17)
      at process.processImmediate (node:internal/timers:471:21)