Run test suits in serial fashion in vitest

[raviSussol]

How can I run test suits in serial way using vitest like we do in the jest with --runInBand flag? I have a build function which builds a test server and it has 2 life cycle hook functions beforeAll and afterAll used inside that build function. For instance,

// testServer.ts

import { beforeAll, afterAll } from 'vitest';
import fastify from '../src/fastify';

const build = () => {
  const server = fastify({ logger: true });

  // setup test lifecycle hooks
  beforeAll(async () => await server.ready());
  afterAll(async () => await server.close());
  return server;
};

export default build;

and this function is used in multiple testing files to use that same test server. Now the problem is with command vitest those multiple test suits runs in parallel of which the beforeAll tries to be executed all at once wherever it has been used in multiple files. So initializing of same server app in same instance all at once doesn't help to run server and thus the testing suits are quit. I have a same setup but in jest and with the --runInBand flag the test suits run in sequential which help to start and close the server in sequential manner leading other testing suits to restart it from scratch.

So I was wondering how I can run test suits in sequential way same like it can be done in jest but using vitest. Any help would be really appreciatated. Thanks.

[sheremet-va]

Ypu can run tests with --no-threads

[raviSussol]

Thanks @sheremet-va looks like that flag worked. But I'm getting a slight different scenarios. I have my script in the package.json as

// package.json
{
  ...,
  "test": "vitest --no-threads",
  ...
}

and when I run yarn test then the test runs and at the end an error is thrown saying error Command failed with exit code 34

But if I run the same command npx vitest --no-threads directly in console then it executes without any errors. Do you have an idea of this?

[OssamaSijbesma]

You could use descibe.each as well, if you want a serial run for only one test suite.
see: https://vitest.dev/api/#describe-each