This paper is an attempt to extend the database of learning objects on WReSTT (Web Repository of Software Testing Tools) that students enrolled in programming courses can use to improve their understanding of testing concepts and testing skills. The first learning object describes Microsoft unit test on C# language. Second learning object describes data driven unit tests using different data sources, such as database, xml, and csv. Third learning object describes different assert classes of unit test. Finally, multiple quizzes are presented to assess student learning.