diff --git a/tests/components/smlight/conftest.py b/tests/components/smlight/conftest.py
index 0338bf4b672..93493daf51d 100644
--- a/tests/components/smlight/conftest.py
+++ b/tests/components/smlight/conftest.py
@@ -1,13 +1,14 @@
 """Common fixtures for the SMLIGHT Zigbee tests."""
 
-from collections.abc import Generator
+from collections.abc import AsyncGenerator, Generator
 from unittest.mock import AsyncMock, MagicMock, patch
 
 from pysmlight.web import Info, Sensors
 import pytest
 
+from homeassistant.components.smlight import PLATFORMS
 from homeassistant.components.smlight.const import DOMAIN
-from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME, Platform
 from homeassistant.core import HomeAssistant
 
 from tests.common import MockConfigEntry, load_json_object_fixture
@@ -31,6 +32,19 @@ def mock_config_entry() -> MockConfigEntry:
     )
 
 
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Platforms, which should be loaded during the test."""
+    return PLATFORMS
+
+
+@pytest.fixture(autouse=True)
+async def mock_patch_platforms(platforms: list[str]) -> AsyncGenerator[None, None]:
+    """Fixture to set up platforms for tests."""
+    with patch(f"homeassistant.components.{DOMAIN}.PLATFORMS", platforms):
+        yield
+
+
 @pytest.fixture
 def mock_setup_entry() -> Generator[AsyncMock, None, None]:
     """Override async_setup_entry."""
@@ -64,7 +78,10 @@ def mock_smlight_client(request: pytest.FixtureRequest) -> Generator[MagicMock]:
         yield api
 
 
-async def setup_integration(hass: HomeAssistant, mock_config_entry: MockConfigEntry):
+async def setup_integration(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+) -> MockConfigEntry:
     """Set up the integration."""
     mock_config_entry.add_to_hass(hass)
 
diff --git a/tests/components/smlight/test_sensor.py b/tests/components/smlight/test_sensor.py
index 4d16a73a0a7..e1239c99e32 100644
--- a/tests/components/smlight/test_sensor.py
+++ b/tests/components/smlight/test_sensor.py
@@ -19,9 +19,9 @@ pytestmark = [
 
 
 @pytest.fixture
-def platforms() -> Platform | list[Platform]:
+def platforms() -> list[Platform]:
     """Platforms, which should be loaded during the test."""
-    return Platform.SENSOR
+    return [Platform.SENSOR]
 
 
 @pytest.mark.usefixtures("entity_registry_enabled_by_default")