diff --git a/homeassistant/components/yeelight/binary_sensor.py b/homeassistant/components/yeelight/binary_sensor.py
index 731751b66f3..4fe3709cdd2 100644
--- a/homeassistant/components/yeelight/binary_sensor.py
+++ b/homeassistant/components/yeelight/binary_sensor.py
@@ -34,6 +34,11 @@ class YeelightNightlightModeSensor(YeelightEntity, BinarySensorEntity):
             )
         )
 
+    @property
+    def unique_id(self) -> str:
+        """Return a unique ID."""
+        return f"{self._unique_id}-nightlight_sensor"
+
     @property
     def name(self):
         """Return the name of the sensor."""
diff --git a/tests/components/yeelight/test_init.py b/tests/components/yeelight/test_init.py
index 86f5bad65da..d9c23cfa1a7 100644
--- a/tests/components/yeelight/test_init.py
+++ b/tests/components/yeelight/test_init.py
@@ -96,7 +96,7 @@ async def test_unique_ids_device(hass: HomeAssistant):
         await hass.async_block_till_done()
 
     er = await entity_registry.async_get_registry(hass)
-    assert er.async_get(ENTITY_BINARY_SENSOR).unique_id == ID
+    assert er.async_get(ENTITY_BINARY_SENSOR).unique_id == f"{ID}-nightlight_sensor"
     assert er.async_get(ENTITY_LIGHT).unique_id == ID
     assert er.async_get(ENTITY_NIGHTLIGHT).unique_id == f"{ID}-nightlight"
     assert er.async_get(ENTITY_AMBILIGHT).unique_id == f"{ID}-ambilight"
@@ -120,7 +120,10 @@ async def test_unique_ids_entry(hass: HomeAssistant):
         await hass.async_block_till_done()
 
     er = await entity_registry.async_get_registry(hass)
-    assert er.async_get(ENTITY_BINARY_SENSOR).unique_id == config_entry.entry_id
+    assert (
+        er.async_get(ENTITY_BINARY_SENSOR).unique_id
+        == f"{config_entry.entry_id}-nightlight_sensor"
+    )
     assert er.async_get(ENTITY_LIGHT).unique_id == config_entry.entry_id
     assert (
         er.async_get(ENTITY_NIGHTLIGHT).unique_id