AggregateError [ECONNREFUSED] in unit tests when rendering Ace editor

[volkanunsal]

Hi. We're noticing that Ace editor is trying to make network calls to local server in our unit tests, which are being refused and throwing these errors. Does anyone know where these network calls might be coming from and how to disable them? Thanks in advance.

node:events:496
      throw er; // Unhandled 'error' event
      ^

AggregateError [ECONNREFUSED]:
    at internalConnectMultiple (node:net:1139:18)
    at afterConnectMultiple (node:net:1712:7)
Emitted 'error' event on ClientRequest instance at:
    at emitErrorEvent (node:_http_client:104:11)
    at Socket.socketErrorListener (node:_http_client:518:5)
    at Socket.emit (node:events:518:28)
    at emitErrorNT (node:internal/streams/destroy:170:8)
    at emitErrorCloseNT (node:internal/streams/destroy:129:3)
    at process.processTicksAndRejections (node:internal/process/task_queues:90:21) {
  code: 'ECONNREFUSED',
  [errors]: [
    Error: connect ECONNREFUSED ::1:3000
        at createConnectionError (node:net:1675:14)
        at afterConnectMultiple (node:net:1705:16) {
      errno: -61,
      code: 'ECONNREFUSED',
      syscall: 'connect',
      address: '::1',
      port: 3000
    },
    Error: connect ECONNREFUSED 127.0.0.1:3000
        at createConnectionError (node:net:1675:14)
        at afterConnectMultiple (node:net:1705:16) {
      errno: -61,
      code: 'ECONNREFUSED',
      syscall: 'connect',
      address: '127.0.0.1',
      port: 3000
    }
  ]
}