# JUnit 4 JUnit is a simple framework to write repeatable tests. It is an instance of the xUnit architecture for unit testing frameworks. > [!IMPORTANT] > **JUnit 4 is in maintenance mode.** > > At this point, only critical bugs and security issues will be fixed.
> All other issues and PRs will therefore be declined.
> For ongoing development, please check out the [junit-framework](https://github.com/junit-team/junit-framework/) repository. For more information, please visit: * [Wiki](https://github.com/junit-team/junit4/wiki) * [Download and Install guide](https://github.com/junit-team/junit4/wiki/Download-and-Install) * [Getting Started](https://github.com/junit-team/junit4/wiki/Getting-started) [![CI Status](https://github.com/junit-team/junit4/workflows/CI/badge.svg)](https://github.com/junit-team/junit4/actions)