It always bugged me that SUnit has to rerun the tests again when you want to debug them. So I made a little use-case where exceptions have an optional continuation, so you can resume/debug them later on. Here's a small example: |e| [ 0 / 0 ] on: Error do: [ :error| e := error freeze ]. e debug freeze simply creates a continuation (at the moment a full one, but that could be of course reduced to a partial one by the TestRunner). Now when you would click on the failing test result you would simply have to activate the corresponding error by sending #debug to it. This would have a major advantage for non-deterministic tests (which of course they should not be). Because in this case you're lost with the current SUnit since the debug stack will differ from the actual test-run which produced the error. Needed Changes: - Continuations (the one from Seaside will just do fine) - Exception >> #freeze saving the continuation - TestCase has to store the actual exception