This issue only needs to be tested in 1 device. In a Moodle site, install 1 question type that isn't supported in the app. In web as teacher/admin, create 4 quizzes: one that only contains questions supported in the app; one that only contains an essay with attachments; one that only contains the question type from step 1; and one that contains all the questions from the previous ones. Login in the app as student and go to the quiz that only has supported questions. Check that no warning is displayed at the quiz entry page. Attempt the quiz. Check you can answer all the questions and submit the quiz. Open the quiz that contains the essay with attachments. Check that no warning is displayed at the quiz entry page. Attempt the quiz. Check that you see a warning below the essay saying you cannot add attachments. Go to the final page of the quiz. Check that you cannot submit the attempt and there's a message explaining why. Open the quiz that only contains the not-supported question type. Check that you see a warning saying you cannot attempt the quiz and a button to open in browser. Open the quiz with all types of questions. Check that you see a warning saying you can attempt the quiz but not submit it. Attempt the quiz. Check that, when you view a question not supported, you see a message saying it's not supported. Go to the final page of the quiz. Check that you cannot submit the attempt and there's a message explaining why.