#JUnit 6.0.0-RC1 is ready for testing!

📰 Everything in 6.0.0-M1 and 6.0.0-M2
🏷 Improved display names for parameterized classes/tests
♻ `MethodOrderer.Default` and `ClassOrderer.Default` for `@Nested` classes

https://junit.org/junit5/docs/6.0.0-RC1/release-notes/

✨ New blog post: "STF Milestone 5: Discovery issues"

Ever written a test that wasn't being executed? 😱

#JUnit 5.13 introduced a mechanism for reporting such issues found during test discovery.

👉 https://marcphilipp.de/blog/2025/08/16/stf-milestone-5-discovery-issues/

Thanks to the @sovtechfund for their support!

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@Test // Java int test() { return 42; } // Not executed!!! 😱😱😱

#JUnit 6.0.0-M2 is ready for testing!

📰 Everything in 6.0.0-M1
🛑 Support for cancelling test execution
⏭️ New `--fail-fast` mode for ConsoleLauncher
🦺 Null-safe `computeIfAbsent` methods for stores
🧐 Strict evaluation of enum-based configuration parameters

https://junit.org/junit5/docs/6.0.0-M2/release-notes/

#JUnit 5.13.4 is released!

🐞 Bug fixes and minor improvements

https://junit.org/junit5/docs/5.13.4/release-notes/

#JUnit 5.13.3 is released!

🐞 Bug fixes and minor improvements

https://junit.org/junit5/docs/5.13.3/release-notes/

#JUnit 6.0.0-M1 is ready for testing!

✨ Require Java 17 and Kotlin 2.2
🌄 JSpecify nullability info
🚟 Kotlin suspend function support
🛫 Integrated custom JFR events
🚅 FastCSV-backed Csv{File}Source
🧹 Remove deprecated APIs and behaviors

https://junit.org/junit5/docs/6.0.0-M1/release-notes/

So happy that @marcphilipp got accepted into the @JavaChampions program. Congratulations!

There are more people on the #JUnit core team that did so much of incredible value to the ecosystem, they literally walking the talk.

✨ New blog post: "STF Milestone 4: Parameterized test classes"

#JUnit 5.13 introduced parameterized test classes (in addition to methods). They are a powerful testing tool that has long been missing from JUnit Jupiter. I’m super happy that I’ve finally had the chance to resolve this long-standing and highly-voted issue thanks to the @sovtechfund.

👉 https://marcphilipp.de/blog/2025/06/07/stf-milestone-4-parameterized-test-classes/

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@ParameterizedClass @ValueSource(strings = {"foo", "bar"}) class SomeTests { @Parameter String value; @Test void shouldNotBeNull() { assertNotNull(value); } @Test void lengthShouldBeThree() { assertEquals(3, value.length()); } }

#JUnit 5.13.1 is released!

🐞 Fix regressions introduced in 5.13.0

https://junit.org/junit5/docs/5.13.1/release-notes/

The slides and code examples for my talk about #JUnit at #IntelliJIDEAConf are now available on https://marcphilipp.de/en/talks/

#JUnit 5.13.0 is released!

🪄 ClassTemplate and ParameterizedClass support
⚠️ Discovery issue reporting for test engines
♻️ Resource management for launcher sessions and execution requests
🔍 Test discovery support in EngineTestKit
👾 ConsoleLauncher improvements

https://junit.org/junit5/docs/5.13.0/release-notes/

The #JUnit team is looking for ideas and proposals for a new logo for the upcoming JUnit 6.0 release!

Please see https://github.com/junit-team/junit5/issues/4576 for ground rules.

We are looking forward to your comments and submissions!

So, do you still think that #JUnit 5 is "the new" thing?

It quite isn't.

The crowdfunding campaign for JUnit Lambda was ten years ago this year.

When @sormuras and I realised that last week at #JCON that made me feel old.

JUnit still rocks, though. Great #Java framework.

#JUnit 5.13.0-RC1 is ready for testing!

🪄 ClassTemplate and ParameterizedClass support
⚠️ Discovery issue reporting for test engines
♻️ Resource management for launcher sessions and execution requests
🔍 Test discovery support in EngineTestKit
🐞 Bug fixes and minor improvements

https://junit.org/junit5/docs/5.13.0-RC1/release-notes/

#JUnit 5.13.0-M3 is ready for testing!

⚠️ Reporting of discovery issues for test engines
♻️ Resource management for launcher sessions and execution requests

https://junit.org/junit5/docs/5.13.0-M3/release-notes/

#JUnit 5.12.2 is released!

🐞 Fix regression when using CleanupMode.ON_SUCCESS

https://junit.org/junit5/docs/5.12.2/release-notes/

#PairProgramming (if you'd like to) #TDD #JUnit5 #Kotlin #Java

✨ New blog post: "STF Milestone 3: Release verification and automation"

A major goal of the @sovtechfund is to help projects become more sustainable and decrease their truck factor. For #JUnit, one activity in desperate need of improvement in this area was performing a release. Prior to this milestone, all JUnit releases of the past years had been performed from my local computer. It was high time to change that!

https://marcphilipp.de/blog/2025/04/01/stf-milestone-3-release-verification-and-automation/

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screenshot of GitHub Actions workflow chart