The actual and appealing objective of XP's approach to unit testing is to improve quality by avoiding errors beforehand rather than to find and fix bugs afterwards. Conventional testing, on the contrary, focuses on a posteriori analysis to find errors and issues that should be corrected. Both approaches have their advantages and drawbacks, and both are valuable and necessary. This paper describes how we combined both approaches by extending our test management environment TEMPPO for unit testing with JUnit to include testers in early unit testing activities.