diff --git a/homeassistant/components/simplisafe/button.py b/homeassistant/components/simplisafe/button.py
index a11ddc04d64..220ca89d170 100644
--- a/homeassistant/components/simplisafe/button.py
+++ b/homeassistant/components/simplisafe/button.py
@@ -19,20 +19,13 @@ from .const import DOMAIN
 from .typing import SystemType
 
 
-@dataclass(frozen=True)
-class SimpliSafeButtonDescriptionMixin:
-    """Define an entity description mixin for SimpliSafe buttons."""
+@dataclass(frozen=True, kw_only=True)
+class SimpliSafeButtonDescription(ButtonEntityDescription):
+    """Describe a SimpliSafe button entity."""
 
     push_action: Callable[[System], Awaitable]
 
 
-@dataclass(frozen=True)
-class SimpliSafeButtonDescription(
-    ButtonEntityDescription, SimpliSafeButtonDescriptionMixin
-):
-    """Describe a SimpliSafe button entity."""
-
-
 BUTTON_KIND_CLEAR_NOTIFICATIONS = "clear_notifications"