Install fresh copy of Moodle Make sure setting "forceclean" is set to no Create a quiz and add questions of types: "gapselect", "ddimageortext", "ddmarker" and "ddwtos" (click "Moodle docs for this page" in the bottom of the each "add question" page for instructions) Attempt quiz as a student, grade as a teacher, make sure all controls work as expected As a teacher add an instance of database module, add fields, set up template Add couple of records Search records, make sure search form works As a teacher add a folder resource with subfolders that is displayed on a course page Make sure it is displayed on the course page fine and you can expand/collapse subfolders Install a new install of Moodle 3.4 Upgrade to 3.5 Open Site administration and search for the forceclean option Confirm that it is not set Confirm that the setting is found under Experimental settings