I received an error during testing, and it killed my CPAN shell.
Please stop doing that.
t/link...................ok
t/local/back.............ok 1/38# Started http://localhost:32994/
Can't locate object method "follow" via package "WWW::Mechanize" at
/root/.cpan/build/WWW-Mechanize-Pluggable-1.01-jJbOy6/blib/lib/WWW/Mechanize/Pluggable.pm
line 359, <$server> line 1.
Use of uninitialized value in kill at t/local/back.t line 138.
Killed
$
I guess you also want follow_link instead of follow in those tests.
follow was removed in version 1.21_03 according to the Changes file
for WWW::Mechanize.