[gnodet]

Problem

When Maven loads maven-it-plugin-project-interpolation:2.1-SNAPSHOT during a forked IT execution, it needs to resolve the plugin's transitive dependencies. The plugin depends on maven-it-helper, which declares org.junit.jupiter:junit-jupiter:5.8.0 as a compile-scope dependency.

The IT suite configures a settings.xml that redirects central to file:target/null to enforce that all required artifacts come from the pre-populated it-local-repo. However junit-jupiter:5.8.0 is not installed into it-local-repo by the outer build (it is downloaded as a build-time dep, not installed as a plugin runtime dep), so the forked Maven fails with:

Could not find artifact org.junit.jupiter:junit-jupiter:jar:5.8.0
in central (file:target/null)

Fix

Add org.junit.jupiter:junit-jupiter to the exclusion list on the maven-it-helper dependency in the plugin POM. The other test-only deps (maven-artifact, maven-verifier, junit:junit) were already excluded; this adds the matching JUnit 5 exclusion.

The plugin code itself does not import or use junit-jupiter at all — the dep on maven-it-helper exists solely to exercise Maven's ${project.version} interpolation in a plugin's dependency section.