def METHOD_NAME(self) -> None:
    with TempSubvolumes() as ts:
        subvol = self._setup_subvol(ts)
        items = [
            MetaKeyValueStoreItem(
                key="key1",
                value="value1",
            ),
            MetaKeyValueStoreItem(
                key="key1",
                value="value2",
                store_if_not_exists=True,
            ),
        ]
        for item in items:
            item.build(subvol, DUMMY_LAYER_OPTS)
        self.assertEqual(
            [
                MetaKeyValueStoreItem(
                    key="key1",
                    value="value1",
                ),
            ],
            load_meta_key_value_store_items(subvol),
        )