4 problems with this:
1) this would never fail in py2 on linux (shutil.copytree doesn't fail with the errors that you're concerned with in #1006 )
2) this could result in one of our tests horribly copying all of /tmp in py2 (if copytree was set back to symlinks=False)
3) this will fail on windows
4) you said you were "adding a test".  adding this link to an existing test package (for other tests), is not adding a specific test .