diff --git a/homeassistant/components/tailscale/binary_sensor.py b/homeassistant/components/tailscale/binary_sensor.py
index ecc561f0355..ee1c682c559 100644
--- a/homeassistant/components/tailscale/binary_sensor.py
+++ b/homeassistant/components/tailscale/binary_sensor.py
@@ -20,20 +20,13 @@ from . import TailscaleEntity
 from .const import DOMAIN
 
 
-@dataclass
-class TailscaleBinarySensorEntityDescriptionMixin:
-    """Mixin for required keys."""
+@dataclass(kw_only=True)
+class TailscaleBinarySensorEntityDescription(BinarySensorEntityDescription):
+    """Describes a Tailscale binary sensor entity."""
 
     is_on_fn: Callable[[TailscaleDevice], bool | None]
 
 
-@dataclass
-class TailscaleBinarySensorEntityDescription(
-    BinarySensorEntityDescription, TailscaleBinarySensorEntityDescriptionMixin
-):
-    """Describes a Tailscale binary sensor entity."""
-
-
 BINARY_SENSORS: tuple[TailscaleBinarySensorEntityDescription, ...] = (
     TailscaleBinarySensorEntityDescription(
         key="update_available",
diff --git a/homeassistant/components/tailscale/sensor.py b/homeassistant/components/tailscale/sensor.py
index 75dca4ed840..f5850848c8c 100644
--- a/homeassistant/components/tailscale/sensor.py
+++ b/homeassistant/components/tailscale/sensor.py
@@ -21,20 +21,13 @@ from . import TailscaleEntity
 from .const import DOMAIN
 
 
-@dataclass
-class TailscaleSensorEntityDescriptionMixin:
-    """Mixin for required keys."""
+@dataclass(kw_only=True)
+class TailscaleSensorEntityDescription(SensorEntityDescription):
+    """Describes a Tailscale sensor entity."""
 
     value_fn: Callable[[TailscaleDevice], datetime | str | None]
 
 
-@dataclass
-class TailscaleSensorEntityDescription(
-    SensorEntityDescription, TailscaleSensorEntityDescriptionMixin
-):
-    """Describes a Tailscale sensor entity."""
-
-
 SENSORS: tuple[TailscaleSensorEntityDescription, ...] = (
     TailscaleSensorEntityDescription(
         key="expires",