A new feature has been released - Quizes. When viewing a Study or JLPT list you will see a new button 'Start a Quiz', from here you can select how many words you wish to quiz and what level of detail you want to see. It is only for vocabulary lists at the moment with Kanji quizzing coming soon.
Update: You can now quiz your Kanji lists as well, enjoy!
Please leave some feedback if you have any issues or suggestions.