Since the early versions of JUnit 3, the framework can work with Java 2 and higher. JUnit3 is open source software, released under Common Public License (CPL) Version 1.0 and hosted on SourceForge (https://sourceforge.net/projects/junit/). The latest version of JUnit 3 was JUnit 3.8.2, released on May 14, 2007. The main requirements introduced by JUnit in the world of testing frameworks were the following:

1. It should be easy to define which tests will run.
2. The framework should be able to run tests independently of all other tests.
3. The framework should detect and report errors test by test.