From: skhisma@... Date: 2006-03-24T05:48:52+09:00 Subject: Re: Inheritance Question This error is related to an earlier post. Test::Unit::TestCase#initialize takes one argument. require 'test/unit' class FooTester < Test::Unit::TestCase def initialize(foo) super(foo) end def test_one assert(true) end end see the earlier post for a much better explination by Ross. :) - Geoff