This document consists of three sections:

Platform

The JUnit Platform serves as a foundation for launching testing frameworks on the JVM. It also defines the TestEngine API for developing a testing framework that runs on the platform. Furthermore, the platform provides a Console Launcher to launch the platform from the command line and a JUnit 4 based Runner for running any TestEngine on the platform in a JUnit 4 based environment.

Jupiter

JUnit Jupiter is the combination of the new programming model and extension model for writing tests and extensions in JUnit 5. The Jupiter sub-project provides a TestEngine for running Jupiter based tests on the platform.

Vintage

JUnit Vintage provides a TestEngine for running JUnit 3 and JUnit 4 based tests on the platform.

Already consulted the JUnit 5 User Guide?

Module	Description
org.junit.jupiter	Aggregates all JUnit Jupiter modules.
org.junit.jupiter.api	Defines JUnit Jupiter API for writing tests.
org.junit.jupiter.engine	Provides the JUnit Jupiter TestEngine implementation.
org.junit.jupiter.migrationsupport	Support for migrating from JUnit 4 to JUnit Jupiter.
org.junit.jupiter.params	JUnit Jupiter extension for parameterized tests.
org.junit.platform.commons	Common APIs and support utilities for the JUnit Platform.
org.junit.platform.console	Support for launching the JUnit Platform from the console.
org.junit.platform.engine	Public API for test engines.
org.junit.platform.launcher	Public API for configuring and launching test plans.
org.junit.platform.reporting	Defines the JUnit Platform Reporting API.
org.junit.platform.runner	Runner and annotations for configuring and executing tests on the JUnit Platform in a JUnit 4 environment.
org.junit.platform.suite.api	Annotations for configuring a test suite on the JUnit Platform.
org.junit.platform.testkit	Defines the Test Kit API for the JUnit Platform.
org.junit.vintage.engine	Provides a TestEngine for running JUnit 3 and 4 based tests on the platform.