Thanks. Looks useful. I like Test::More because it's a core module, so every installation has it, and because it indicates where the data differs (begins to differ). Usually I use this type of comparison where if it fails it should be fatal, so I don't mind the output. I can see how Data::Compare would be a better choice if you wanted to continue anyway. Interestingly, the same author has Test::Differences, which goes in the other direction (is still a Test::, spits TAP to STDOUT, provides a comprehensive diff of the structures).