#!/usr/bin/perl
use warnings;
use strict;

use Test::NoWarnings;
use Test::More tests => 2;

my $old = $SIG{__WARN__};
$SIG{__WARN__} = sub {
    my ($w) = @_;
    return if $w =~ /Eh/;

    warn $w;
    $old->(@_) if $old;
};

ok(1);

warn 'Eh';     # Will be ignored.
warn 'Error';  # Will be reported.
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At work, we use Test::Warnings instead (it handles done_testing() correctly). The solution is similar for this module, you just don't need to rewarn:

#!/usr/bin/perl
use warnings;
use strict;

use Test::Warnings;
use Test::More;


my $old = $SIG{__WARN__};
$SIG{__WARN__} = sub {
    my ($w) = @_;
    return if $w =~ /Eh/;

    $old->(@_) if $old
};

ok(1);

warn 'Eh';     # Will be ignored.
warn 'Error';  # Will be reported.

done_testing();
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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
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