@bhepler Thanks! Switching away from the fake driver seems to fix it.

Two commits I’ve worked on for the testing.

1. Check keys in the translation files. Produces errors currently, so I’ve added .skip.
   https://github.com/qistoph/MagicMirror/commit/123392c54934e49a397d586c1fb8dbcc4cc5d12b

2. To prevent loading app.js from corrupting the Mocha test environment, I suggest to execute the app.js in a virtual environment. This can also serve as an example for future test cases where code needs to be executed in the global namespace.
   https://github.com/qistoph/MagicMirror/commit/cd8bee1371ffc6cce7b7bf44f85cd03705e4c1bd

Any thoughts before I submit a PR?