diff --git a/homeassistant/helpers/entity.py b/homeassistant/helpers/entity.py
index 66bbc744b70..c0b301b6fb6 100644
--- a/homeassistant/helpers/entity.py
+++ b/homeassistant/helpers/entity.py
@@ -1092,7 +1092,7 @@ class Entity(
     @callback
     def _async_write_ha_state(self) -> None:
         """Write the state to the state machine."""
-        if self._platform_state == EntityPlatformState.REMOVED:
+        if self._platform_state is EntityPlatformState.REMOVED:
             # Polling returned after the entity has already been removed
             return
 
@@ -1305,7 +1305,7 @@ class Entity(
         parallel_updates: asyncio.Semaphore | None,
     ) -> None:
         """Start adding an entity to a platform."""
-        if self._platform_state != EntityPlatformState.NOT_ADDED:
+        if self._platform_state is not EntityPlatformState.NOT_ADDED:
             raise HomeAssistantError(
                 f"Entity '{self.entity_id}' cannot be added a second time to an entity"
                 " platform"
@@ -1572,7 +1572,7 @@ class Entity(
 
         If the entity is not added to a platform it's not safe to call _stringify_state.
         """
-        if self._platform_state != EntityPlatformState.ADDED:
+        if self._platform_state is not EntityPlatformState.ADDED:
             return f"<entity unknown.unknown={STATE_UNKNOWN}>"
         return f"<entity {self.entity_id}={self._stringify_state(self.available)}>"