MongoMemoryServer errors when running the integration test from the plugin template

[atlasgong]

Describe the Bug

On a fresh Ubuntu 24.10 install:
Running the default integration test provided by the plugin template returns the error

Test Suites: 1 failed, 1 total
Tests:       3 failed, 3 total
Snapshots:   0 total
Time:        1.054 s, estimated 10 s
Ran all test suites.
  console.warn
    Starting the MongoMemoryServer Instance failed, enable debug log for more information. Error:
     UnexpectedCloseError: Instance closed unexpectedly with code "null" and signal "SIGILL"
    The Process Exited with SIGILL, which mean illegal instruction, which is commonly thrown in mongodb 5.0+ when not having AVX available on the CPU
        at MongoInstance.closeHandler (/home/atlas/ashds/node_modules/.pnpm/mongodb-memory-server-core@10.1.4/node_modules/mongodb-memory-server-core/src/util/MongoInstance.ts:581:52)
        at ChildProcess.emit (node:events:518:28)
        at maybeClose (node:internal/child_process:1101:16)
        at Socket.<anonymous> (node:internal/child_process:456:11)
        at Socket.emit (node:events:518:28)
        at Pipe.<anonymous> (node:net:351:12)

      at node_modules/.pnpm/mongodb-memory-server-core@10.1.4/node_modules/mongodb-memory-server-core/src/MongoMemoryServer.ts:359:17
      at MongoMemoryServer.start (node_modules/.pnpm/mongodb-memory-server-core@10.1.4/node_modules/mongodb-memory-server-core/src/MongoMemoryServer.ts:350:5)
          at async Promise.all (index 0)

 ELIFECYCLE  Test failed. See above for more details.

Link to the code that reproduces this issue

https://github.com/payloadcms/payload/tree/main/templates/plugin

Reproduction Steps

1. Run pnpx create-payload-app@latest -t plugin
2. Enter project name, press enter, wait for success message
3. Unrelated but thedotenv dev dependency is missing so you must run pnpm add -D dotenv. (A PR is already created for this fix(deps): add missing dotenv dev dependency for plugin template #12168),
4. Run pnpm test
5. Note the error

Which area(s) are affected? (Select all that apply)

area: templates

Environment Info

Binaries:
  Node: 22.14.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 10.8.1
Relevant Packages:
  payload: 3.29.0
  next: 15.3.0
  @payloadcms/db-mongodb: 3.29.0
  @payloadcms/db-postgres: 3.29.0
  @payloadcms/graphql: 3.29.0
  @payloadcms/next/utilities: 3.29.0
  @payloadcms/richtext-lexical: 3.29.0
  @payloadcms/translations: 3.29.0
  @payloadcms/ui/shared: 3.29.0
  react: 19.1.0
  react-dom: 19.1.0
Operating System:
  Platform: linux
  Arch: x64
  Version: #104 SMP Mon Mar 17 06:15:48 UTC 2025
  Available memory (MB): 12009
  Available CPU cores: 10