diff --git a/homeassistant/components/skybell/sensor.py b/homeassistant/components/skybell/sensor.py
index 04fb33d9be3..5f0df77ecfa 100644
--- a/homeassistant/components/skybell/sensor.py
+++ b/homeassistant/components/skybell/sensor.py
@@ -23,20 +23,13 @@ from homeassistant.helpers.typing import StateType
 from .entity import DOMAIN, SkybellEntity
 
 
-@dataclass(frozen=True)
-class SkybellSensorEntityDescriptionMixIn:
-    """Mixin for Skybell sensor."""
+@dataclass(frozen=True, kw_only=True)
+class SkybellSensorEntityDescription(SensorEntityDescription):
+    """Class to describe a Skybell sensor."""
 
     value_fn: Callable[[SkybellDevice], StateType | datetime]
 
 
-@dataclass(frozen=True)
-class SkybellSensorEntityDescription(
-    SensorEntityDescription, SkybellSensorEntityDescriptionMixIn
-):
-    """Class to describe a Skybell sensor."""
-
-
 SENSOR_TYPES: tuple[SkybellSensorEntityDescription, ...] = (
     SkybellSensorEntityDescription(
         key="chime_level",