"Multiple promises" fails on MacOS

[ohcibi]

I can only reproduce this in MacOS. The very same code for the solution works on linux.

Steps to reproduce

npm install -g promise-it-wont-hurt
promise-it-wont-hurt select "Multiple promises"
wget https://raw.githubusercontent.com/stevekane/promise-it-wont-hurt/master/exercises/multiple_promises/solution/solution.js
promise-it-wont-hurt verify solution.js

Expected

Workshopper should pass

Actual

$ promise-it-wont-hurt verify solution.js                                                                                                                                                            
✓ Execution time within ±100ms of expected

Your submission results compared to the expected:

                 ACTUAL                                 EXPECTED
────────────────────────────────────────────────────────────────────────────────

   ""                                  ==    ""

────────────────────────────────────────────────────────────────────────────────

✓ Submission results match expected
✗ You did not call then from function all

# FAIL

Your solution to Multiple promises didn't pass. Try again!

[michaalbert]

I had the exact same issue on Linux Ubuntu 16.04 LTS, Node 8.1.2.