TestLocationToUrl fails on Windows

brz selftest: D:/py3/Scripts/brz
   D:\py3\brz-3.2\breezy
   bzr-3.2.1 python-3.9.2 Windows-10-10.0.19041-SP0

FAIL: test_location.TestLocationToUrl.test_path
    Empty attachments:
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Traceback (most recent call last):
  File "D:\py3\brz-3.2\breezy\tests\test_location.py", line 70, in test_path
    self.assertEqual(url, location_to_url(path))
  File "D:\py3\brz-3.2\breezy\tests\__init__.py", line 1307, in assertEqual
    raise AssertionError("%snot equal:\na = %s\nb = %s\n"
AssertionError: not equal:
a = 'file:///D:/foo/bar'
b = 'ssh://D/foo/bar'