diff --git a/homeassistant/components/haveibeenpwned/sensor.py b/homeassistant/components/haveibeenpwned/sensor.py
index d9d2889848e..0e8de64d7c6 100644
--- a/homeassistant/components/haveibeenpwned/sensor.py
+++ b/homeassistant/components/haveibeenpwned/sensor.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 from datetime import timedelta
 from http import HTTPStatus
 import logging
+from typing import TYPE_CHECKING, Any
 
 import requests
 import voluptuous as vol
@@ -59,40 +60,26 @@ class HaveIBeenPwnedSensor(SensorEntity):
 
     _attr_attribution = "Data provided by Have I Been Pwned (HIBP)"
 
-    def __init__(self, data, email):
+    def __init__(self, data: HaveIBeenPwnedData, email: str) -> None:
         """Initialize the HaveIBeenPwned sensor."""
-        self._state = None
         self._data = data
         self._email = email
-        self._unit_of_measurement = "Breaches"
+        self._attr_name = f"Breaches {email}"
+        self._attr_native_unit_of_measurement = "Breaches"
 
     @property
-    def name(self):
-        """Return the name of the sensor."""
-        return f"Breaches {self._email}"
-
-    @property
-    def native_unit_of_measurement(self):
-        """Return the unit the value is expressed in."""
-        return self._unit_of_measurement
-
-    @property
-    def native_value(self):
-        """Return the state of the device."""
-        return self._state
-
-    @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> dict[str, Any]:
         """Return the attributes of the sensor."""
-        val = {}
+        val: dict[str, Any] = {}
         if self._email not in self._data.data:
             return val
 
         for idx, value in enumerate(self._data.data[self._email]):
             tmpname = f"breach {idx + 1}"
-            datetime_local = dt_util.as_local(
-                dt_util.parse_datetime(value["AddedDate"])
-            )
+            parsed_datetime = dt_util.parse_datetime(value["AddedDate"])
+            if TYPE_CHECKING:
+                assert parsed_datetime is not None
+            datetime_local = dt_util.as_local(parsed_datetime)
             tmpvalue = f"{value['Title']} {datetime_local.strftime(DATE_STR_FORMAT)}"
             val[tmpname] = tmpvalue
 
@@ -121,7 +108,7 @@ class HaveIBeenPwnedSensor(SensorEntity):
             )
             return
 
-        self._state = len(self._data.data[self._email])
+        self._attr_native_value = len(self._data.data[self._email])
         self.schedule_update_ha_state()
 
     def update(self) -> None:
@@ -129,7 +116,7 @@ class HaveIBeenPwnedSensor(SensorEntity):
         self._data.update()
 
         if self._email in self._data.data:
-            self._state = len(self._data.data[self._email])
+            self._attr_native_value = len(self._data.data[self._email])
 
 
 class HaveIBeenPwnedData: