diff --git a/homeassistant/components/fully_kiosk/button.py b/homeassistant/components/fully_kiosk/button.py
index 975a225853b..94c34b50de1 100644
--- a/homeassistant/components/fully_kiosk/button.py
+++ b/homeassistant/components/fully_kiosk/button.py
@@ -23,20 +23,13 @@ from .coordinator import FullyKioskDataUpdateCoordinator
 from .entity import FullyKioskEntity
 
 
-@dataclass(frozen=True)
-class FullyButtonEntityDescriptionMixin:
-    """Mixin to describe a Fully Kiosk Browser button entity."""
+@dataclass(frozen=True, kw_only=True)
+class FullyButtonEntityDescription(ButtonEntityDescription):
+    """Fully Kiosk Browser button description."""
 
     press_action: Callable[[FullyKiosk], Any]
 
 
-@dataclass(frozen=True)
-class FullyButtonEntityDescription(
-    ButtonEntityDescription, FullyButtonEntityDescriptionMixin
-):
-    """Fully Kiosk Browser button description."""
-
-
 BUTTONS: tuple[FullyButtonEntityDescription, ...] = (
     FullyButtonEntityDescription(
         key="restartApp",
diff --git a/homeassistant/components/fully_kiosk/switch.py b/homeassistant/components/fully_kiosk/switch.py
index 601517e50b6..9d5af87abe9 100644
--- a/homeassistant/components/fully_kiosk/switch.py
+++ b/homeassistant/components/fully_kiosk/switch.py
@@ -19,9 +19,9 @@ from .coordinator import FullyKioskDataUpdateCoordinator
 from .entity import FullyKioskEntity
 
 
-@dataclass(frozen=True)
-class FullySwitchEntityDescriptionMixin:
-    """Fully Kiosk Browser switch entity description mixin."""
+@dataclass(frozen=True, kw_only=True)
+class FullySwitchEntityDescription(SwitchEntityDescription):
+    """Fully Kiosk Browser switch entity description."""
 
     on_action: Callable[[FullyKiosk], Any]
     off_action: Callable[[FullyKiosk], Any]
@@ -30,13 +30,6 @@ class FullySwitchEntityDescriptionMixin:
     mqtt_off_event: str | None
 
 
-@dataclass(frozen=True)
-class FullySwitchEntityDescription(
-    SwitchEntityDescription, FullySwitchEntityDescriptionMixin
-):
-    """Fully Kiosk Browser switch entity description."""
-
-
 SWITCHES: tuple[FullySwitchEntityDescription, ...] = (
     FullySwitchEntityDescription(
         key="screensaver",