(Note I am using CoUnit 1.2.00 but I looked at the source of TcUnit and it has the same issue)
I inherited from FB_TestSuite to create a AssertEquals_String that accepts longer strings, but I can't build because the following methods are marked INTERNAL. They should be marked Protected, unless this was done intentionally.
AddTestNameToInstancePath
FindTestSuiteInstancePath
SetTestFailed
T_MaxString isn't configurable so the only option I saw was to extend FB_TestSuite