Couldn't really find out the process to create the test yet. But this would make it successful:

parent.js

const { spawn } = require('child_process');

const child = spawn('babel-node', ['child.js'], {
  stdio: ['inherit', 'inherit', 'inherit', 'ipc']
});

child.on('message', (msg) => {
   expect(msg).to.be.equal('hello');
   done();
});

child.js

process.send('hello');

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Thanks! I can try working on a test based on your code.

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/44576/

@nicolo-ribaudo I squashed the typo and a linting error. I might need some help to understand the Publish to local Verdaccio registry (pull_request)test that fails, 'cause I've no idea what it is.

EDIT: Ok nvm, looks like it passed this time 🤷‍♂️

Test added! It's indeed failing without your change.

For reviewers: please review my commit separately, since one only renames files but git doesn't properly track the rename when viewing the commit together.

Test added! It's indeed failing without your change.

For reviewers: please review my commit separately, since one only renames files but git doesn't properly track the rename when viewing the commit together.

Thanks for your help with the tests @nicolo-ribaudo 👍

Ok it looks like I have to increase the timeout

The windows test is failing with https://stackoverflow.com/questions/63303200/node-child-process-spawn-bad-file-descriptor-on-windows-with-ipc 🤔

Thanks @nicolo-ribaudo @JLHwung

Thanks for the fix!