Just out of curiosity, why would he want to purposely fail an attribute test?
Rellegar's Rest in the Heirs of Blood Campaign. The Heroes had the staff, but the OL had the hallway blocked off by monsters. They wanted to make a quick escape by searching the nearby green token and failing the attribute check. A failed test on that token sends you back to the unique space near the entrance, thereby bypassing the corridor stopped up by the monsters.