You need to test all aspects of match questions.
1. Create, edit and delete match questions.
2. Preview a match question.
3. Export match questions as Moodle XML, and re-import and check that all the options are correctly preserved.
4. Backup and restore a course with match questions, and check that all the settings are correctly preserved.
5. In a Moodle 2.0 install, create a quiz including some match questions. Attempt that quiz with some student accounts. Backup the course including user data, and restore it to your master install. Verify the question definitions and attempt data is transferred correctly.
6. In am Moodle 1.9 install, create a quiz including some match questions. Back up that course, and restore it into your master install. Verify that the question definitions are transferred correctly.