I usually do 

ok( $thing->model, $model ) or 
    diag Dumper $thing;

[download]
which outputs to STDERR and saves one keystroke ;-)

This way you are guaranteed that your output won't interfere with the tests, even though I'm pretty certain that the Dumper output will not interfere.

In reply to Re: Using Data::Dumper in Test-Driven Development by guha
in thread Using Data::Dumper in Test-Driven Development by dws

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