diff --git a/switchbot/devices/lock.py b/switchbot/devices/lock.py
index 275e6280..5564c742 100644
--- a/switchbot/devices/lock.py
+++ b/switchbot/devices/lock.py
@@ -237,7 +237,10 @@ async def _get_lock_info(self) -> bytes | None:
 
     async def _enable_notifications(self) -> bool:
         result = await self._send_command(COMMAND_ENABLE_NOTIFICATIONS[self._model])
-        return self._check_command_result(result, 0, COMMAND_RESULT_EXPECTED_VALUES)
+        if self._check_command_result(result, 0, COMMAND_RESULT_EXPECTED_VALUES):
+            self._notifications_enabled = True
+            return True
+        return False
 
     async def _disable_notifications(self) -> bool:
         if not self._notifications_enabled:
diff --git a/tests/test_lock.py b/tests/test_lock.py
index d47a1e99..93441ef7 100644
--- a/tests/test_lock.py
+++ b/tests/test_lock.py
@@ -408,9 +408,34 @@ async def test_get_lock_info_failure(model: str):
 async def test_enable_notifications(model: str):
     """Test _enable_notifications method."""
     device = create_device_for_command_testing(model)
-    with patch.object(device, "_send_command", return_value=b"\x01\x00"):
+    assert device._notifications_enabled is False
+    with patch.object(device, "_send_command", return_value=b"\x01\x00") as mock_send:
         result = await device._enable_notifications()
         assert result is True
+        assert device._notifications_enabled is True
+        assert mock_send.call_count == 1
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "model",
+    [
+        SwitchbotModel.LOCK,
+        SwitchbotModel.LOCK_LITE,
+        SwitchbotModel.LOCK_PRO,
+        SwitchbotModel.LOCK_ULTRA,
+        SwitchbotModel.LOCK_VISION,
+        SwitchbotModel.LOCK_VISION_PRO,
+        SwitchbotModel.LOCK_PRO_WIFI,
+    ],
+)
+async def test_enable_notifications_failure_keeps_state_false(model: str):
+    """Failed enable command must not flip the tracked state to True."""
+    device = create_device_for_command_testing(model)
+    with patch.object(device, "_send_command", return_value=b"\x00\x00"):
+        result = await device._enable_notifications()
+        assert result is False
+        assert device._notifications_enabled is False
 
 
 @pytest.mark.asyncio