Compatibility with Jupiter 6.0.0+

[mxcross]

New feature, improvement proposal

junit-jupiter-api now has 6.0.0 and 6.0.1 available. I'm unable to use the latest version of junit because maven-surefire is unable to execute tests with the upgrade. It continues to load the 1.12.1 platform launcher causing conflicts with the desired platform launcher. Ignoring the system classloader and the maven classloader doesn't change the behavior.

[Bukama]

What we have to keep in mind: JUnit 6 requires Java 17, so if we ship things of it, it can only be done in Maven 4 version of the plugin

[slawekjaranowski]

Should be works, can create a simple reproduce project?

[slawekjaranowski]

Please also look at:

• https://github.com/apache/maven-surefire/issues/850

[olamy]

you should be able to override the dependency by adding it in the dependencies section of the plugin itself.

[mxcross]

@olamy that is the first thing I tried. Something about the loading of the classpath completely ignored the version of JUnit I was setting and always got the version the plugin is compiled with. I think the main issue is there is an incompatibility between a call surefire is making and the changes made to junit in the new version.

[2025-11-06T15:12:36.038Z] [ERROR] java.lang.NoSuchMethodError: 'java.util.stream.Collector org.junit.platform.commons.util.CollectionUtils.toUnmodifiableList()'

[2025-11-06T15:12:36.038Z] [ERROR] org.apache.maven.surefire.api.util.SurefireReflectionException: java.lang.NoSuchMethodError: 'java.util.stream.Collector org.junit.platform.commons.util.CollectionUtils.toUnmodifiableList()'

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.api.util.ReflectionUtils.instantiateOneArg(ReflectionUtils.java:107)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.createProviderInCurrentClassloader(ForkedBooter.java:449)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:385)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:507)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:495)

[2025-11-06T15:12:36.038Z] [ERROR] Caused by: java.lang.NoSuchMethodError: 'java.util.stream.Collector org.junit.platform.commons.util.CollectionUtils.toUnmodifiableList()'

[2025-11-06T15:12:36.038Z] [ERROR] at org.junit.platform.launcher.TagFilter.parseAll(TagFilter.java:176)

[2025-11-06T15:12:36.038Z] [ERROR] at org.junit.platform.launcher.TagFilter.includeMatching(TagFilter.java:133)

[2025-11-06T15:12:36.038Z] [ERROR] at org.junit.platform.launcher.TagFilter.includeTags(TagFilter.java:89)

[2025-11-06T15:12:36.038Z] [ERROR] at java.base/java.util.Optional.map(Optional.java:260)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.newFilters(JUnitPlatformProvider.java:229)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.(JUnitPlatformProvider.java:104)

[2025-11-06T15:12:36.038Z] [ERROR] at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.(JUnitPlatformProvider.java:98)

[2025-11-06T15:12:36.038Z] [ERROR] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

[2025-11-06T15:12:36.039Z] [ERROR] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)

[2025-11-06T15:12:36.039Z] [ERROR] at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

[2025-11-06T15:12:36.039Z] [ERROR] at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)

[2025-11-06T15:12:36.039Z] [ERROR] at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)

[2025-11-06T15:12:36.039Z] [ERROR] at org.apache.maven.surefire.api.util.ReflectionUtils.instantiateOneArg(ReflectionUtils.java:105)

[2025-11-06T15:12:36.039Z] [ERROR] ... 5 more

[pzygielo]

It's like guessing what numbers were used to sum to 10.

@mxcross Could you show your 5 and 4?

[mxcross]

I have 0 junit 4 tests, this is ensured by the maven-enforcer-plugin. Everything in my setup is set to use the jupiter 6.0.0 version, which is how I start to see the error. It's a massive repository that I'm not able to share with the public.

mvn dependency:tree also confirms all of my imports are on jupiter 6.0.0.

[pzygielo]

By 5 and 4 I meant the numbers to sum to get 10.

It's a massive repository that I'm not able to share with the public.

Don't. Prepare reproducer to show the problem reported.

[pzygielo]

I'm unable to use the latest version of junit because maven-surefire is unable to execute tests with the upgrade.

I'm able and I see no issue with JUnit 6.0.x.

[mxcross]

Seering as I opened it as an enhancement request, it doesn't seem unreasonable to ask that a new 4.x version of the plugin be compiled with the latest junit apis.

[slawekjaranowski]

@mxcross can you provide a simple project which reproduce your issue?

[olamy]

yup need a reproducer as it works fine for such large project https://github.com/jetty/jetty.project/pull/14027