Set up Create a new outcome (if you don't have any, create 2 and use the second) Create a new scale (if you don't have any, create 2 and use the second) Create a new course Add the outcome to the course Create a few gradeable activities One using points One using scales One using outcomes Enrol a few students in the course Navigate to the gradebook Create a few manual items One using points One using scales One using outcomes Give a grade to the students for each existing item Repeat but change the grade to create grade history Navigate to the grade history report to make sure some history exists Backup the course Leave the settings as default, but make sure "Include grade history" is disabled when you untick "Include enrolled users" or "Include activities". Restore 1 Restore the course as a new course Navigate to the grade history and Make sure the history has been restored (you will see some new items marked as 'restored', those are considered as new history) Make sure that the filtering based on grade items works (that means that the new mapping worked) Restore 2 Create a new instance of Moodle Restore the course as a new course Make sure the history has been restored Make sure that the filtering based on grade items works Check mdl_grade_grades_history and ensure that the column 'rawscaleid' has been updated as compared to the values from the original site. (this means that the mapping for the scale has been processed properly). Restore 3 Restore the course in an existing course Make sure the history has been restored, possible doubled if you restored the course over itself. Make sure that the filtering based on grade items works Additional Test Create a full backup from 2.6 Restore on master Make sure that worked as expected Find a backup from 1.9 somewhere (there are 2 attached to this issue). Restore on master Make sure that worked as expected Find a backup from 2.0 somewhere (there is 1 attached to this issue). Restore on master Make sure that worked as expected