my $score = result_of_a_function();

cmp_ok($score, '==', 0, 'scores 0 in blablabla context');

##</code><code>##

print $score;

##</code><code>##

is($score, 0, 'scores 0 in blablabla context');

##</code><code>##

1>undef

##</code><code>##

cmp_ok($got, '<', $expected)