Log in to Osiris Student and go to 'Enrol > Show my enrolments'.

In the next screen, click 'Tests'. This will show you all the tests you are currently enrolled in.

Select the test you want to disenrol from. The test will open at the right side on the screen and the button 'Disenrol Test' will appear.

Click 'Disenrol Test' and a pop-up will appear. Click OK to confirm you disenrolment.