diff --git a/homeassistant/components/openuv/sensor.py b/homeassistant/components/openuv/sensor.py
index 431fa41a288..9e337d49ba3 100644
--- a/homeassistant/components/openuv/sensor.py
+++ b/homeassistant/components/openuv/sensor.py
@@ -71,20 +71,13 @@ def get_uv_label(uv_index: int) -> str:
     return label.value
 
 
-@dataclass(frozen=True)
-class OpenUvSensorEntityDescriptionMixin:
-    """Define a mixin for OpenUV sensor descriptions."""
+@dataclass(frozen=True, kw_only=True)
+class OpenUvSensorEntityDescription(SensorEntityDescription):
+    """Define a class that describes OpenUV sensor entities."""
 
     value_fn: Callable[[dict[str, Any]], int | str]
 
 
-@dataclass(frozen=True)
-class OpenUvSensorEntityDescription(
-    SensorEntityDescription, OpenUvSensorEntityDescriptionMixin
-):
-    """Define a class that describes OpenUV sensor entities."""
-
-
 SENSOR_DESCRIPTIONS = (
     OpenUvSensorEntityDescription(
         key=TYPE_CURRENT_OZONE_LEVEL,