JUnit 5 introduces several new features including parameterized tests that allow running tests with different inputs, assumptions to conditionally execute tests, nested tests to group related tests and reduce boilerplate, annotations to name tests and repeat execution, and an extension API to customize test execution with multiple extensions registered per test class.

1. JUnit 5 Features
A quick look at some cool features available in JUnit 5.
https://samdjstevens.github.io/junit-5-migration

2. Parameterized Tests
Run tests multiple times with different inputs. The inputs to the test can come
from a variety of sources - from method executions to external CSV files.

3. Assumptions
Conditionally execute tests based on other assertions being true or false.

4. Nested Tests
Express the relationship between closely
related tests and cut down on boilerplate
by using Nested Tests.

5. @DisplayName @RepeatedTest
Give tests more readable names. Execute tests more than once.

6. Extension API
Junit 5 introduced the Extension API, an
incredibly powerful API that lets you hook
into every step of the test execution.
Unlike JUnit 4 Runners, multiple extensions
can be registered on a test class
simultaneously.

7. Want to know more?
junit5-adoption
https://samdjstevens.github.io/junit-5-migration