Upgrading to Embe-cli@2.7.0 killed ember test -s for browsers

Question

After upgrading an ember project to ember-cli@2.7.0 I stumbled upon problem of getting

$ ember test -s

work with my test browsers again (Chromium, Firefox).

Only PhantomJS was launched, no matter how I did set up config file testem.js

Answer 1

I realized that there are 2 testem-related config files after the upgrade:

• testem.js
• testem.json

Removing the latter one (testem.json) made it work again.