Adding a URL to JUnit output will automatically hyperlink in the page for the individual test (see https://issues.jenkins-ci.org/browse/JENKINS-3225 ). However, it does not get linked for the Test Report page when expanding the failure.

Steps to reproduce:

1. Create a Freestyle job with url.xml in the workspace
2. In the build steps, touch url.xml
3. In Post-Build Actions, add Publish JUnit test result report with Test Result XMLs as *.xml
4. Run job
5. Go to Test Results
6. Expand All Failed Tests
7. URL is not hyperlinked.
8. Click test name link to go to test page.
9. URL is hyperlinked.