Failing test: Fleet Serverless Observability API Integration Tests.x-pack/test_serverless/api_integration/test_suites/observability/fleet/fleet·ts - fleet rejects request to create a new elasticsearch output if host is different from default

[kibanamachine]

A test failed on a tracked branch

JestAssertionError: expect(received).toEqual(expected) // deep equality

- Expected  - 3
+ Received  + 3

  Object {
-   "error": "Bad Request",
-   "message": "Elasticsearch output host must have default URL in serverless: https://localhost:9200",
-   "statusCode": 400,
+   "error": "Not Found",
+   "message": "Saved object [ingest-outputs/7c16a2b8-95ac-54a0-81c7-f00ff91e325a] not found",
+   "statusCode": 404,
  }
    at Context.<anonymous> (fleet.ts:63:20)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Object.apply (wrap_function.js:73:16) {
  matcherResult: {
    actual: {
      statusCode: 404,
      error: 'Not Found',
      message: 'Saved object [ingest-outputs/7c16a2b8-95ac-54a0-81c7-f00ff91e325a] not found'
    },
    expected: {
      statusCode: 400,
      error: 'Bad Request',
      message: 'Elasticsearch output host must have default URL in serverless: https://localhost:9200'
    },
    message: '\x1B[2mexpect(\x1B[22m\x1B[31mreceived\x1B[39m\x1B[2m).\x1B[22mtoEqual\x1B[2m(\x1B[22m\x1B[32mexpected\x1B[39m\x1B[2m) // deep equality\x1B[22m\n' +
      '\n' +
      '\x1B[32m- Expected  - 3\x1B[39m\n' +
      '\x1B[31m+ Received  + 3\x1B[39m\n' +
      '\n' +
      '\x1B[2m  Object {\x1B[22m\n' +
      '\x1B[32m-   "error": "Bad Request",\x1B[39m\n' +
      '\x1B[32m-   "message": "Elasticsearch output host must have default URL in serverless: https://localhost:9200",\x1B[39m\n' +
      '\x1B[32m-   "statusCode": 400,\x1B[39m\n' +
      '\x1B[31m+   "error": "Not Found",\x1B[39m\n' +
      '\x1B[31m+   "message": "Saved object [ingest-outputs/7c16a2b8-95ac-54a0-81c7-f00ff91e325a] not found",\x1B[39m\n' +
      '\x1B[31m+   "statusCode": 404,\x1B[39m\n' +
      '\x1B[2m  }\x1B[22m',
    name: 'toEqual',
    pass: false
  }
}

First failure: CI Build - main

[kibanamachine]

New failure: CI Build - main

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[mistic]

Skipped.

main: bb6a38f

[kibanamachine]

New failure: CI Build - main

[kibanamachine]

New failure: CI Build - main

[jillguyonnet]

The fix was backported to 8.13. I've run 700 successful tests in #178476 for good measure, so closing this for now.