Test that the upgrade form the previous version does not cause any DB errors. Add a quiz. In the quiz, add a random question. In mdl_question, find the question. Make sure the questiontext is '0'. Remove the random question, and add one back. Confirm that no additional questions were added to the table. Add a random question with include sub-categories on. In mdl_question, confirm there is now a 2nd question, with questiontext '1'. Remove the random question, and add it back, confirm that an additional question was not added. Add a new random question (3rd), and confirm that it is created in mdl_question Restore the backup file attached to this ticket. Find the new entries in mdl_question, and confirm that there are two random questions, one with questiontext '0', one with '1'. Please test steps 1. and 12-13. in all supported databases (sorry).