Hmm, those errors should have been fixed in 0.7.11 in testing/test_selection.py.TestLockedFoldersNotError. Mac Sierra made some funky changes that keeps you from deleting a directory with perms of 0o0000, thus causing test cleanup of those two tests to fail, and in general messing up the entire test cycle.
There should be two lines before each test def with:
@unittest.skipUnless(platform.platform().startswith('Linux'),
'Skip on non-Linux systems')
Plus, if you ran the tests already, then the directory testing/testfiles may still be around to screw up the next test run.
...Ken