QUnit tests won't pass in discourse_dev docker image

Development
2

Works fine for me on Linux with the latest tests-passed branch checked out:

~/Projects/discourse sudo d/bundle exec rake "qunit:test['200000']"
phantomjs /src/vendor/assets/javascripts/run-qunit.js http://localhost:60099/qunit 200000
Unable to access network

  phantomjs://code/run-qunit.js:34
Puma starting in single mode...
* Version 3.6.0 (ruby 2.3.3-p222), codename: Sleepy Sunday Serenity
* Min threads: 0, max threads: 16
* Environment: development
* Listening on tcp://0.0.0.0:60099
Use Ctrl-C to stop
phantomjs /src/vendor/assets/javascripts/run-qunit.js http://localhost:60099/qunit 200000

Running: {}

...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Time: 159725ms, Total: 2098, Passed: 2098, Failed: 0

Tests Passed

I’m not sure this helps a great deal…