When you're done testing, don't forget to let the team know whether you could complete the game and post links to any bugs you submitted to their tracker in this post on the ScummVM forums.
Source: Kolzig
ScummVM Testing for Zork Nemesis and Grand Inquisitor 13 Jan, 2015 / 0 comments
ScummVM has just announced support for two new games in their daily builds, Zork Nemesis and Zork: Grand Inquisitor. In order to support these games in the next stable release, they need people to help them out by playing through them and reporting any bugs they find to their bug tracker so the ScummVM team can squash them. They also need people to submit screenshots for the games.