diff --git a/homeassistant/components/notion/binary_sensor.py b/homeassistant/components/notion/binary_sensor.py
index a1c519f228f..8e4d5927152 100644
--- a/homeassistant/components/notion/binary_sensor.py
+++ b/homeassistant/components/notion/binary_sensor.py
@@ -30,24 +30,17 @@ from .const import (
     SENSOR_SMOKE_CO,
     SENSOR_WINDOW_HINGED,
 )
-from .model import NotionEntityDescriptionMixin
+from .model import NotionEntityDescription
 
 
-@dataclass(frozen=True)
-class NotionBinarySensorDescriptionMixin:
-    """Define an entity description mixin for binary and regular sensors."""
-
-    on_state: Literal["alarm", "leak", "low", "not_missing", "open"]
-
-
-@dataclass(frozen=True)
+@dataclass(frozen=True, kw_only=True)
 class NotionBinarySensorDescription(
-    BinarySensorEntityDescription,
-    NotionBinarySensorDescriptionMixin,
-    NotionEntityDescriptionMixin,
+    BinarySensorEntityDescription, NotionEntityDescription
 ):
     """Describe a Notion binary sensor."""
 
+    on_state: Literal["alarm", "leak", "low", "not_missing", "open"]
+
 
 BINARY_SENSOR_DESCRIPTIONS = (
     NotionBinarySensorDescription(
diff --git a/homeassistant/components/notion/model.py b/homeassistant/components/notion/model.py
index cdfd6e63dad..a774bfdfad3 100644
--- a/homeassistant/components/notion/model.py
+++ b/homeassistant/components/notion/model.py
@@ -4,8 +4,8 @@ from dataclasses import dataclass
 from aionotion.sensor.models import ListenerKind
 
 
-@dataclass(frozen=True)
-class NotionEntityDescriptionMixin:
-    """Define an description mixin Notion entities."""
+@dataclass(frozen=True, kw_only=True)
+class NotionEntityDescription:
+    """Define an description for Notion entities."""
 
     listener_kind: ListenerKind
diff --git a/homeassistant/components/notion/sensor.py b/homeassistant/components/notion/sensor.py
index 8c4242aec2a..1d2c81addfa 100644
--- a/homeassistant/components/notion/sensor.py
+++ b/homeassistant/components/notion/sensor.py
@@ -16,11 +16,11 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
 from . import NotionEntity
 from .const import DOMAIN, SENSOR_MOLD, SENSOR_TEMPERATURE
-from .model import NotionEntityDescriptionMixin
+from .model import NotionEntityDescription
 
 
-@dataclass(frozen=True)
-class NotionSensorDescription(SensorEntityDescription, NotionEntityDescriptionMixin):
+@dataclass(frozen=True, kw_only=True)
+class NotionSensorDescription(SensorEntityDescription, NotionEntityDescription):
     """Describe a Notion sensor."""