A problem over the years in Perl 5 has been that bugs mysteriously get fixed. This is a big problem for two reasons. First, we don't know when a bug is fixed and we are able to close the bug from the RT queue. Second, we don't know if the bug is fixed and then broken again.
I'll be working on getting tests TODO tests created for as many of the existing bugs in the Perl 5 bug queue as possible over the weekend. This is fortunately an easy place for nearly anyone to contribute.