def METHOD_NAME(self):
    """
    Assert that correct url is returned.
    """
    project = models.Project(
        name="test", homepage="https://example.org", backend=BACKEND
    )
    exp = "https://pypi.org/pypi/test/json"
    obs = backend.PypiBackend.get_version_url(project)
    self.assertEqual(obs, exp)