diff --git a/homeassistant/components/schlage/binary_sensor.py b/homeassistant/components/schlage/binary_sensor.py
index 5c97a903c72..fae6208b95f 100644
--- a/homeassistant/components/schlage/binary_sensor.py
+++ b/homeassistant/components/schlage/binary_sensor.py
@@ -20,25 +20,13 @@ from .coordinator import LockData, SchlageDataUpdateCoordinator
 from .entity import SchlageEntity
 
 
-@dataclass(frozen=True)
-class SchlageBinarySensorEntityDescriptionMixin:
-    """Mixin for required keys."""
-
-    # NOTE: This has to be a mixin because these are required keys.
-    # BinarySensorEntityDescription has attributes with default values,
-    # which means we can't inherit from it because you haven't have
-    # non-default arguments follow default arguments in an initializer.
+@dataclass(frozen=True, kw_only=True)
+class SchlageBinarySensorEntityDescription(BinarySensorEntityDescription):
+    """Entity description for a Schlage binary_sensor."""
 
     value_fn: Callable[[LockData], bool]
 
 
-@dataclass(frozen=True)
-class SchlageBinarySensorEntityDescription(
-    BinarySensorEntityDescription, SchlageBinarySensorEntityDescriptionMixin
-):
-    """Entity description for a Schlage binary_sensor."""
-
-
 _DESCRIPTIONS: tuple[SchlageBinarySensorEntityDescription] = (
     SchlageBinarySensorEntityDescription(
         key="keypad_disabled",
diff --git a/homeassistant/components/schlage/switch.py b/homeassistant/components/schlage/switch.py
index 36c8fa74244..467fbc671bf 100644
--- a/homeassistant/components/schlage/switch.py
+++ b/homeassistant/components/schlage/switch.py
@@ -24,27 +24,15 @@ from .coordinator import SchlageDataUpdateCoordinator
 from .entity import SchlageEntity
 
 
-@dataclass(frozen=True)
-class SchlageSwitchEntityDescriptionMixin:
-    """Mixin for required keys."""
-
-    # NOTE: This has to be a mixin because these are required keys.
-    # SwitchEntityDescription has attributes with default values,
-    # which means we can't inherit from it because you haven't have
-    # non-default arguments follow default arguments in an initializer.
+@dataclass(frozen=True, kw_only=True)
+class SchlageSwitchEntityDescription(SwitchEntityDescription):
+    """Entity description for a Schlage switch."""
 
     on_fn: Callable[[Lock], None]
     off_fn: Callable[[Lock], None]
     value_fn: Callable[[Lock], bool]
 
 
-@dataclass(frozen=True)
-class SchlageSwitchEntityDescription(
-    SwitchEntityDescription, SchlageSwitchEntityDescriptionMixin
-):
-    """Entity description for a Schlage switch."""
-
-
 SWITCHES: tuple[SchlageSwitchEntityDescription, ...] = (
     SchlageSwitchEntityDescription(
         key="beeper",