In tests I work on, it is common to print URLs as part of the failure message or
stdout/stderr to refer the failure evaluator to some other resource, e.g. a wiki
page explaining why this test is significant, or a bug report, or even a
screenshot captured during the test:

http://hg.netbeans.org/main/diff/d2e46e3d2b9c/jellytools.platform/src/org/netbeans/jellytools/JellyTestCase.java

Unfortunately, Hudson's web output does not hyperlink these URLs, so you have to
copy them and paste them into the Location bar. It would be nice if these were
automatically detected, and hyperlinked.