Yeah, that would be useful. You also could build up a temporary hash and compare that... something like: 
my %clean = %$hashref1;
delete @clean{qw( key1 key2 )};

eq_hash( \%clean, $hashref2, 'partial hash comparison' );

[download]
I dunno how Schwern would react to wanting ignorable keys... it kinda breaks the pattern of 'result, 'expected', 'test name'.

Another approach is to add a new function. Test::More is built around Test::Builder, and it's pretty easy to add new features. Of course, I'm a *little* biased. :)

In reply to Re: Test::More extension idea by chromatic
in thread Test::More extension idea by herveus

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