This test involves updating the code and checking the apache error log. Testing As an Admin go to Site administration > Plugins > Document converters > Manage document converters. Enable Unoconv Click on the Unoconv settings link. Click on the test unoconv path (ensure the unoconv path is properly configured). If not, configure unoconv following these documentation instructions. Go to a course and create an assignment. Make sure that the assignment takes file submissions. In files/converter/unoconv/classes/converter.php - start_document_conversion() edit the first if statement that contains an error log an set the if condition to true. You can do it by simply adding " true || " immediately after the parenthesis. Example, for the first condition, change: if (!self::are_requirements_met()) { to if (true || !self::are_requirements_met()) { Log in as a student. Submit a file for the assignment. Log in as a teacher. Grade the assignment (must be through the grading interface that allows pdf annotation). View the error log. Ensure that the error message is shown. Repeat steps 7 - 10 (don't forget to remove the previous condition change or you will continue getting the previous message) for each if statement that contains an error_log() call in start_document_conversion(), checking that the appropriate message is displayed in the log.