diff --git a/tests/components/twentemilieu/test_init.py b/tests/components/twentemilieu/test_init.py
index b97578588bf..64377022713 100644
--- a/tests/components/twentemilieu/test_init.py
+++ b/tests/components/twentemilieu/test_init.py
@@ -53,8 +53,8 @@ async def test_update_config_entry_unique_id(
     mock_config_entry: MockConfigEntry,
 ) -> None:
     """Test the we update old config entries with an unique ID."""
-    mock_config_entry.unique_id = None
     mock_config_entry.add_to_hass(hass)
+    hass.config_entries.async_update_entry(mock_config_entry, unique_id=None)
 
     await hass.config_entries.async_setup(mock_config_entry.entry_id)
     await hass.async_block_till_done()