Cover by newly created Behat. Manual testing as below Create a course. Create 3 users called: s1, t1. Enrol s1 as student to the created course. Enrol t1 as teacher to the created course. Login as t1. Navigate to the Participant page of the created course. Click on s1 student. Verify that you will see a button called: Add to contacts next to the Message button. Click on that button. Verify that that button will be changed to Contact request sent . Verify that that button will be disabled . Verify that nothing happens when you click on that button. Reload that page. Verify that the button still says: Contact request sent Verify that the button is still disabled . Login as s1 . Navigate to the Participant page of the created course. Click on t1 . Verify that you will see a button called:  Waiting for your approval Verify that that button will be disabled . Verify that nothing happens when you click on that button. Click on the Message icon (Toggle message drawer) Verify that you will see (1) next to the Contacts link. Click on Contacts . Click on Requests Verify that you will see: [T1 fullname] would like to contact you . Click on that request. Click Accept and add to contacts. Log out and log in as t1 again. Navigate to the Participant page of the created course. Click on s1 student. Verify that you will see a button called: Remove from contacts next to the Message button. Click on that button. Verify that that button will be changed to Add to contacts . Verify that that button will not be disabled .