def METHOD_NAME(self):
    bzr = sources.Bazaar(
        self.working_tree, self.source_dir, source_tag="mock-tag", silent=True
    )
    bzr.pull()
    source_details = bzr._get_source_details()
    self.assertThat(source_details["source-tag"], Equals("mock-tag"))
    self.fake_check_output.mock.assert_not_called()
    self.fake_check_call.mock.assert_called_once_with(
        [
            "bzr",
            "pull",
            "-r",
            "tag:mock-tag",
            self.working_tree,
            "-d",
            self.source_dir,
        ],
        stderr=-3,
        stdout=-3,
    )