To Edit the name of a Quiz or Test, follow the below steps:
Open an existing Quiz or Test by following the steps in this document
Once the Quiz is opened, click on the "Quiz Name" on the top left hand corner:
The drop down expands and shows the Quiz Name.
Mouse Hover on the "Quiz Name"
A "Pencil" icon is displayed next to the "Quiz Name":
Click on the "Pencil" icon
Edit the Name & hit the "Enter" button on your keyboard
The "Quiz Name" gets changed successfully