http://www.perlmonks.org?node_id=903821


in reply to cpan Plack fails

If you are installing by downloading the source and doing the ... 
$ perl Makefile.PL
...
$ make
...
$ make test
...
$ make install

[download]
... way of installing the module, you should execute: 
$ rm t/Plack-Middleware/conditionalget_writer.t

[download]
... before you run ... 
$ make test

[download]

In Section Seekers of Perl Wisdom