The second test in this class intermittently makes the first fail for me: if I run either separately they're fine, but if both are run the first fails for me most of the time. Commenting out lines the imports like https://github.com/bpython/bpython/blob/master/bpython/test/test_curtsies_repl.py#L333 in the second test make the first pass reliably. I only get the failures in Python 3, and they don't seem to occur on Travis.