You may need to add a section and skip for IBM i.

CI: https://ci.nodejs.org/job/node-test-pull-request/36691/ ✅

According to the docs:

The path.relative() method returns the relative path from from to to based on the current working directory.

So you'll get different results depending on where you are in the file system.

> process.cwd()
'/'
> path.posix.relative('a/b/c', '../../x');
'../../../x'
> process.chdir('/Users/trott/io.js')
undefined
> process.cwd()
'/Users/trott/io.js'
> path.posix.relative('a/b/c', '../../x');
'../../../../../x'
> 

So I updated the test to use a regex to make sure we cover all (three) possibilities.

CI: https://ci.nodejs.org/job/node-test-pull-request/36705/ ✅

Landed in 55f0955