I'm not sure I agree with that, but putting that aside, I have a problem with the two sets of tests running separately. The problem is that the summary of tests for iris will be printed before all the output from the experimental tests. This means you might need to go hunting for the most important test summary. Is it possible for all the tests to run together? Possibly a symlink from iris/experimental/tests to iris/tests/experimental? Doesn't sound great either. Thoughts?