diff --git a/tests/components/smlight/__init__.py b/tests/components/smlight/__init__.py
index 37184226507e73..e518e0573bab0d 100644
--- a/tests/components/smlight/__init__.py
+++ b/tests/components/smlight/__init__.py
@@ -1 +1,21 @@
 """Tests for the SMLIGHT Zigbee adapter integration."""
+
+from collections.abc import Callable
+from unittest.mock import MagicMock
+
+from pysmlight.const import Events as SmEvents
+from pysmlight.sse import MessageEvent
+
+
+def get_mock_event_function(
+    mock: MagicMock, event: SmEvents
+) -> Callable[[MessageEvent], None]:
+    """Extract event function from mock call_args."""
+    return next(
+        (
+            call_args[0][1]
+            for call_args in mock.sse.register_callback.call_args_list
+            if call_args[0][0] == event
+        ),
+        None,
+    )
diff --git a/tests/components/smlight/test_binary_sensor.py b/tests/components/smlight/test_binary_sensor.py
index 1b1c0358c37061..b1d72b66dcfef9 100644
--- a/tests/components/smlight/test_binary_sensor.py
+++ b/tests/components/smlight/test_binary_sensor.py
@@ -1,6 +1,5 @@
 """Tests for the SMLIGHT binary sensor platform."""
 
-from collections.abc import Callable
 from unittest.mock import MagicMock
 
 from freezegun.api import FrozenDateTimeFactory
@@ -14,6 +13,7 @@
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_registry as er
 
+from . import get_mock_event_function
 from .conftest import setup_integration
 
 from tests.common import MockConfigEntry, async_fire_time_changed, snapshot_platform
@@ -95,13 +95,8 @@ async def test_internet_sensor_event(
     assert len(mock_smlight_client.get_param.mock_calls) == 2
     mock_smlight_client.get_param.assert_called_with("inetState")
 
-    event_function: Callable[[MessageEvent], None] = next(
-        (
-            call_args[0][1]
-            for call_args in mock_smlight_client.sse.register_callback.call_args_list
-            if call_args[0][0] == Events.EVENT_INET_STATE
-        ),
-        None,
+    event_function = get_mock_event_function(
+        mock_smlight_client, Events.EVENT_INET_STATE
     )
 
     event_function(MOCK_INET_STATE)
diff --git a/tests/components/smlight/test_update.py b/tests/components/smlight/test_update.py
index b0b8910ef9bbcc..7bff12bb027a81 100644
--- a/tests/components/smlight/test_update.py
+++ b/tests/components/smlight/test_update.py
@@ -1,6 +1,5 @@
 """Tests for the SMLIGHT update platform."""
 
-from collections.abc import Callable
 from unittest.mock import MagicMock
 
 from freezegun.api import FrozenDateTimeFactory
@@ -23,6 +22,7 @@
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import entity_registry as er
 
+from . import get_mock_event_function
 from .conftest import setup_integration
 
 from tests.common import MockConfigEntry, async_fire_time_changed, snapshot_platform
@@ -67,18 +67,6 @@
 ]
 
 
-def get_callback_function(mock: MagicMock, trigger: SmEvents):
-    """Extract the callback function for a given trigger."""
-    return next(
-        (
-            call_args[0][1]
-            for call_args in mock.sse.register_callback.call_args_list
-            if trigger == call_args[0][0]
-        ),
-        None,
-    )
-
-
 @pytest.fixture
 def platforms() -> list[Platform]:
     """Platforms, which should be loaded during the test."""
@@ -122,17 +110,13 @@ async def test_update_firmware(
 
     assert len(mock_smlight_client.fw_update.mock_calls) == 1
 
-    event_function: Callable[[MessageEvent], None] = get_callback_function(
-        mock_smlight_client, SmEvents.ZB_FW_prgs
-    )
+    event_function = get_mock_event_function(mock_smlight_client, SmEvents.ZB_FW_prgs)
 
     event_function(MOCK_FIRMWARE_PROGRESS)
     state = hass.states.get(entity_id)
     assert state.attributes[ATTR_IN_PROGRESS] == 50
 
-    event_function: Callable[[MessageEvent], None] = get_callback_function(
-        mock_smlight_client, SmEvents.FW_UPD_done
-    )
+    event_function = get_mock_event_function(mock_smlight_client, SmEvents.FW_UPD_done)
 
     event_function(MOCK_FIRMWARE_DONE)
 
@@ -178,9 +162,7 @@ async def test_update_legacy_firmware_v2(
 
     assert len(mock_smlight_client.fw_update.mock_calls) == 1
 
-    event_function: Callable[[MessageEvent], None] = get_callback_function(
-        mock_smlight_client, SmEvents.ESP_UPD_done
-    )
+    event_function = get_mock_event_function(mock_smlight_client, SmEvents.ESP_UPD_done)
 
     event_function(MOCK_FIRMWARE_DONE)
 
@@ -220,9 +202,7 @@ async def test_update_firmware_failed(
 
     assert len(mock_smlight_client.fw_update.mock_calls) == 1
 
-    event_function: Callable[[MessageEvent], None] = get_callback_function(
-        mock_smlight_client, SmEvents.ZB_FW_err
-    )
+    event_function = get_mock_event_function(mock_smlight_client, SmEvents.ZB_FW_err)
 
     async def _call_event_function(event: MessageEvent):
         event_function(event)