From time to time, some of our users report that the Function Test app is requesting a passcode when launching, instead of running the desired test profile. This happens when the app is launched without a test profile loaded. You can avoid this error by waiting until the device tile in Lean One-Touch has turned green, and reads "On-Device Functional Test in Progress"

If you do get prompted for a passcode, you are still able to proceed. Wait until the tile turns green, then force-close the Function Test app on the device and relaunch it. The app should start using the now-uploaded profile.