Can't locate Filter/signatures.pm in @INC (you may need to install the Filter::signatures module) (@INC entries checked: ... .) at t/61-popup.t line 7.
BEGIN failed--compilation aborted at t/61-popup.t line 7.
t/61-popup.t ..................................
Dubious, test returned 2 (wstat 512, 0x200)
No subtests run
t/61-popup.t fails on some systems like this: