say cpanp -i Plack fails a test, cpanp will prompt you with

The tests for 'Plack' failed. Would you like me to proceed anyway or s
+hould we abort?
Proceed anyway? [y/N]:
[download]

How to disable this interactivity?

Note, I am not interested in skipping tests or forcing install, I just don't want to be prompted for any reason, after all, I didn't start the interactive shell cpanp, and have disabled allow_build_interactivity