As of Jenkins 2.64, the 'war-for-test' is no longer published to http://repo.jenkins-ci.org/releases/org/jenkins-ci/main/jenkins-war/.
This is expected, as it is the result of
However, currently, the Gradle JPI Plugin expects this artifact to always be available, regardless of Jenkins version:
This causes an issue when running, for example, 'gradle test' in a project applying the Gradle JPI Plugin, as it cannot find war-for-test.
Here is a minimal reproduction, which can be run with 'gradle test'