diff --git a/tests/components/roku/conftest.py b/tests/components/roku/conftest.py
index c1ceb23934e..2015d01ea68 100644
--- a/tests/components/roku/conftest.py
+++ b/tests/components/roku/conftest.py
@@ -87,8 +87,10 @@ async def init_integration(
     mock_roku: MagicMock,
 ) -> MockConfigEntry:
     """Set up the Roku integration for testing."""
-    mock_config_entry.unique_id = mock_device.info.serial_number
     mock_config_entry.add_to_hass(hass)
+    hass.config_entries.async_update_entry(
+        mock_config_entry, unique_id=mock_device.info.serial_number
+    )
 
     await hass.config_entries.async_setup(mock_config_entry.entry_id)
     await hass.async_block_till_done()
diff --git a/tests/components/roku/test_init.py b/tests/components/roku/test_init.py
index 2ebad1e0b2b..7f291f020d9 100644
--- a/tests/components/roku/test_init.py
+++ b/tests/components/roku/test_init.py
@@ -32,8 +32,8 @@ async def test_config_entry_no_unique_id(
     mock_roku: AsyncMock,
 ) -> None:
     """Test the Roku configuration entry with missing 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()