Hi, My Setup ======= Program defines class | Test case requires Program for test method Roman1 => Roman | tc_TestA.rb => Roman1 => testA Roman2 => Roman | tc_TestB.rb => Roman2 => testB Roman3 => Roman | tc_TestC.rb => Roman3 => testC TestRomanNumberGeneration.rb is simply: require 'test/unit' require 'tc_TestA' require 'tc_TestB' require 'tc_TestC' tc_TestA generates no test output tc_TestB generates: 1) Error testB(TestRoman): RuntimeError [snip] ./roman3.rb:9 in 'initialize' [snip] [snip] My Question ========= testB is defined in tc_TestB.rb which requires "require 'roman2'" ... so why does it report an error ostensibly caused by roman3.rb? My Solution ========= One cannot have separate files defining (or redefining?) the same class, "Roman" in this case. That seems to be reinforced by diagnostics for testC about redefinition of constants, which can only occur in this case if it's including definitions from another program file. So the way out is to use three different class names (which is sensible because I'm testing different versions of the same class). I could just do that and not bother posting, but I'd like to know that I won't wind up masking some other problem if the symptom goes away. Any ideas? Thanks in Advance, Richard