Covered by behat tests.   For manual testing: Create a course Setup the following users and enrol them to the course as following roles: teacher1 as 'editingteacher' teacher2 as 'teacher' student1 as 'student' student2 as 'student' Set up a groupings Set up 2 groups ( eg. group1 and group2) where only group1 is part of the grouping Set the teacher1 and student1 to be members of the group1 and within the grouping Set the teacher2 and student2 to be members of the group2 Create a question category and couple of questions Create a quiz in a separate group mode and add the questions to this quiz. Let student1 and student2 attempt the quiz Login as teacher1 and go to Quiz -> Results -> Manual gradingverify that students attempts can be access Login as teacher2 and go to Quiz -> Results -> Manual grading and verify that students attempts cannot be accessed and verify that you see 'Sorry, but you need to be part of a group to see this page.'