diff --git a/homeassistant/components/homekit/accessories.py b/homeassistant/components/homekit/accessories.py
index ac6e8969d91..1cf549437b8 100644
--- a/homeassistant/components/homekit/accessories.py
+++ b/homeassistant/components/homekit/accessories.py
@@ -313,7 +313,7 @@ class HomeAccessory(Accessory):
         Run inside the Home Assistant event loop.
         """
         state = self.hass.states.get(self.entity_id)
-        await self.async_update_state_callback(None, None, state)
+        self.async_update_state_callback(None, None, state)
         async_track_state_change(
             self.hass, self.entity_id, self.async_update_state_callback
         )
@@ -329,7 +329,9 @@ class HomeAccessory(Accessory):
                 ATTR_BATTERY_CHARGING
             )
             async_track_state_change(
-                self.hass, self.linked_battery_sensor, self.async_update_linked_battery
+                self.hass,
+                self.linked_battery_sensor,
+                self.async_update_linked_battery_callback,
             )
         else:
             battery_state = state.attributes.get(ATTR_BATTERY_LEVEL)
@@ -341,17 +343,16 @@ class HomeAccessory(Accessory):
             async_track_state_change(
                 self.hass,
                 self.linked_battery_charging_sensor,
-                self.async_update_linked_battery_charging,
+                self.async_update_linked_battery_charging_callback,
             )
         elif battery_charging_state is None:
             battery_charging_state = state.attributes.get(ATTR_BATTERY_CHARGING)
 
         if battery_state is not None or battery_charging_state is not None:
-            self.hass.async_add_executor_job(
-                self.update_battery, battery_state, battery_charging_state
-            )
+            self.async_update_battery(battery_state, battery_charging_state)
 
-    async def async_update_state_callback(
+    @ha_callback
+    def async_update_state_callback(
         self, entity_id=None, old_state=None, new_state=None
     ):
         """Handle state change listener callback."""
@@ -371,12 +372,11 @@ class HomeAccessory(Accessory):
         ):
             battery_charging_state = new_state.attributes.get(ATTR_BATTERY_CHARGING)
         if battery_state is not None or battery_charging_state is not None:
-            await self.hass.async_add_executor_job(
-                self.update_battery, battery_state, battery_charging_state
-            )
-        await self.hass.async_add_executor_job(self.update_state, new_state)
+            self.async_update_battery(battery_state, battery_charging_state)
+        self.async_update_state(new_state)
 
-    async def async_update_linked_battery(
+    @ha_callback
+    def async_update_linked_battery_callback(
         self, entity_id=None, old_state=None, new_state=None
     ):
         """Handle linked battery sensor state change listener callback."""
@@ -384,19 +384,17 @@ class HomeAccessory(Accessory):
             battery_charging_state = None
         else:
             battery_charging_state = new_state.attributes.get(ATTR_BATTERY_CHARGING)
-        await self.hass.async_add_executor_job(
-            self.update_battery, new_state.state, battery_charging_state,
-        )
+        self.async_update_battery(new_state.state, battery_charging_state)
 
-    async def async_update_linked_battery_charging(
+    @ha_callback
+    def async_update_linked_battery_charging_callback(
         self, entity_id=None, old_state=None, new_state=None
     ):
         """Handle linked battery charging sensor state change listener callback."""
-        await self.hass.async_add_executor_job(
-            self.update_battery, None, new_state.state == STATE_ON
-        )
+        self.async_update_battery(None, new_state.state == STATE_ON)
 
-    def update_battery(self, battery_level, battery_charging):
+    @ha_callback
+    def async_update_battery(self, battery_level, battery_charging):
         """Update battery service if available.
 
         Only call this function if self._support_battery_level is True.
@@ -427,7 +425,8 @@ class HomeAccessory(Accessory):
                 "%s: Updated battery charging to %d", self.entity_id, hk_charging
             )
 
-    def update_state(self, new_state):
+    @ha_callback
+    def async_update_state(self, new_state):
         """Handle state change to update HomeKit value.
 
         Overridden by accessory types.
diff --git a/homeassistant/components/homekit/type_cameras.py b/homeassistant/components/homekit/type_cameras.py
index fe181d56c8c..ae91362c5fc 100644
--- a/homeassistant/components/homekit/type_cameras.py
+++ b/homeassistant/components/homekit/type_cameras.py
@@ -12,6 +12,7 @@ from pyhap.const import CATEGORY_CAMERA
 
 from homeassistant.components.camera.const import DOMAIN as DOMAIN_CAMERA
 from homeassistant.components.ffmpeg import DATA_FFMPEG
+from homeassistant.core import callback
 from homeassistant.util import get_local_ip
 
 from .accessories import TYPES, HomeAccessory
@@ -144,7 +145,8 @@ class Camera(HomeAccessory, PyhapCamera):
             options=options,
         )
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Handle state change to update HomeKit value."""
         pass  # pylint: disable=unnecessary-pass
 
diff --git a/homeassistant/components/homekit/type_covers.py b/homeassistant/components/homekit/type_covers.py
index 25d1782b392..1e18ad82b94 100644
--- a/homeassistant/components/homekit/type_covers.py
+++ b/homeassistant/components/homekit/type_covers.py
@@ -25,6 +25,7 @@ from homeassistant.const import (
     STATE_OPEN,
     STATE_OPENING,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory, debounce
 from .const import (
@@ -92,7 +93,7 @@ class GarageDoorOpener(HomeAccessory):
         self.char_target_state = serv_garage_door.configure_char(
             CHAR_TARGET_DOOR_STATE, value=0, setter_callback=self.set_state
         )
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_state(self, value):
         """Change garage state if call came from HomeKit."""
@@ -108,7 +109,8 @@ class GarageDoorOpener(HomeAccessory):
                 self.char_current_state.set_value(HK_DOOR_CLOSING)
             self.call_service(DOMAIN, SERVICE_CLOSE_COVER, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update cover state after state changed."""
         hass_state = new_state.state
         target_door_state = DOOR_TARGET_HASS_TO_HK.get(hass_state)
@@ -184,7 +186,8 @@ class WindowCoveringBase(HomeAccessory):
 
         self.call_service(DOMAIN, SERVICE_SET_COVER_TILT_POSITION, params, value)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update cover position and tilt after state changed."""
         # update tilt
         current_tilt = new_state.attributes.get(ATTR_CURRENT_TILT_POSITION)
@@ -230,7 +233,7 @@ class WindowCovering(WindowCoveringBase, HomeAccessory):
         self.char_position_state = self.serv_cover.configure_char(
             CHAR_POSITION_STATE, value=HK_POSITION_STOPPED
         )
-        self.update_state(state)
+        self.async_update_state(state)
 
     @debounce
     def move_cover(self, value):
@@ -241,7 +244,8 @@ class WindowCovering(WindowCoveringBase, HomeAccessory):
         params = {ATTR_ENTITY_ID: self.entity_id, ATTR_POSITION: value}
         self.call_service(DOMAIN, SERVICE_SET_COVER_POSITION, params, value)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update cover position and tilt after state changed."""
         current_position = new_state.attributes.get(ATTR_CURRENT_POSITION)
         if isinstance(current_position, (float, int)):
@@ -271,7 +275,7 @@ class WindowCovering(WindowCoveringBase, HomeAccessory):
             if self.char_position_state.value != HK_POSITION_STOPPED:
                 self.char_position_state.set_value(HK_POSITION_STOPPED)
 
-        super().update_state(new_state)
+        super().async_update_state(new_state)
 
 
 @TYPES.register("WindowCoveringBasic")
@@ -295,7 +299,7 @@ class WindowCoveringBasic(WindowCoveringBase, HomeAccessory):
         self.char_position_state = self.serv_cover.configure_char(
             CHAR_POSITION_STATE, value=HK_POSITION_STOPPED
         )
-        self.update_state(state)
+        self.async_update_state(state)
 
     @debounce
     def move_cover(self, value):
@@ -322,7 +326,8 @@ class WindowCoveringBasic(WindowCoveringBase, HomeAccessory):
         self.char_current_position.set_value(position)
         self.char_target_position.set_value(position)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update cover position after state changed."""
         position_mapping = {STATE_OPEN: 100, STATE_CLOSED: 0}
         hk_position = position_mapping.get(new_state.state)
@@ -341,4 +346,4 @@ class WindowCoveringBasic(WindowCoveringBase, HomeAccessory):
             if self.char_position_state.value != HK_POSITION_STOPPED:
                 self.char_position_state.set_value(HK_POSITION_STOPPED)
 
-        super().update_state(new_state)
+        super().async_update_state(new_state)
diff --git a/homeassistant/components/homekit/type_fans.py b/homeassistant/components/homekit/type_fans.py
index b80a65eede1..d6231efe7ad 100644
--- a/homeassistant/components/homekit/type_fans.py
+++ b/homeassistant/components/homekit/type_fans.py
@@ -26,6 +26,7 @@ from homeassistant.const import (
     STATE_OFF,
     STATE_ON,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -80,13 +81,13 @@ class Fan(HomeAccessory):
 
         if CHAR_ROTATION_SPEED in chars:
             # Initial value is set to 100 because 0 is a special value (off). 100 is
-            # an arbitrary non-zero value. It is updated immediately by update_state
+            # an arbitrary non-zero value. It is updated immediately by async_update_state
             # to set to the correct initial value.
             self.char_speed = serv_fan.configure_char(CHAR_ROTATION_SPEED, value=100)
 
         if CHAR_SWING_MODE in chars:
             self.char_swing = serv_fan.configure_char(CHAR_SWING_MODE, value=0)
-        self.update_state(state)
+        self.async_update_state(state)
         serv_fan.setter_callback = self._set_chars
 
     def _set_chars(self, char_values):
@@ -146,7 +147,8 @@ class Fan(HomeAccessory):
         params = {ATTR_ENTITY_ID: self.entity_id, ATTR_SPEED: speed}
         self.call_service(DOMAIN, SERVICE_SET_SPEED, params, speed)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update fan after state change."""
         # Handle State
         state = new_state.state
diff --git a/homeassistant/components/homekit/type_lights.py b/homeassistant/components/homekit/type_lights.py
index 3f4c2518202..612d8e53a02 100644
--- a/homeassistant/components/homekit/type_lights.py
+++ b/homeassistant/components/homekit/type_lights.py
@@ -23,6 +23,7 @@ from homeassistant.const import (
     STATE_OFF,
     STATE_ON,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -77,7 +78,7 @@ class Light(HomeAccessory):
 
         if CHAR_BRIGHTNESS in self.chars:
             # Initial value is set to 100 because 0 is a special value (off). 100 is
-            # an arbitrary non-zero value. It is updated immediately by update_state
+            # an arbitrary non-zero value. It is updated immediately by async_update_state
             # to set to the correct initial value.
             self.char_brightness = serv_light.configure_char(CHAR_BRIGHTNESS, value=100)
 
@@ -100,7 +101,7 @@ class Light(HomeAccessory):
         if CHAR_SATURATION in self.chars:
             self.char_saturation = serv_light.configure_char(CHAR_SATURATION, value=75)
 
-        self.update_state(state)
+        self.async_update_state(state)
 
         serv_light.setter_callback = self._set_chars
 
@@ -138,7 +139,8 @@ class Light(HomeAccessory):
 
         self.call_service(DOMAIN, service, params, ", ".join(events))
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update light after state change."""
         # Handle State
         state = new_state.state
diff --git a/homeassistant/components/homekit/type_locks.py b/homeassistant/components/homekit/type_locks.py
index 5697306bf32..af5b24c50e1 100644
--- a/homeassistant/components/homekit/type_locks.py
+++ b/homeassistant/components/homekit/type_locks.py
@@ -5,6 +5,7 @@ from pyhap.const import CATEGORY_DOOR_LOCK
 
 from homeassistant.components.lock import DOMAIN, STATE_LOCKED, STATE_UNLOCKED
 from homeassistant.const import ATTR_CODE, ATTR_ENTITY_ID, STATE_UNKNOWN
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import CHAR_LOCK_CURRENT_STATE, CHAR_LOCK_TARGET_STATE, SERV_LOCK
@@ -45,7 +46,7 @@ class Lock(HomeAccessory):
             value=HASS_TO_HOMEKIT[STATE_LOCKED],
             setter_callback=self.set_state,
         )
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_state(self, value):
         """Set lock state to value if call came from HomeKit."""
@@ -62,7 +63,8 @@ class Lock(HomeAccessory):
             params[ATTR_CODE] = self._code
         self.call_service(DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update lock after state changed."""
         hass_state = new_state.state
         if hass_state in HASS_TO_HOMEKIT:
diff --git a/homeassistant/components/homekit/type_media_players.py b/homeassistant/components/homekit/type_media_players.py
index 3dccca7a322..4a104972b02 100644
--- a/homeassistant/components/homekit/type_media_players.py
+++ b/homeassistant/components/homekit/type_media_players.py
@@ -36,6 +36,7 @@ from homeassistant.const import (
     STATE_STANDBY,
     STATE_UNKNOWN,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -150,7 +151,7 @@ class MediaPlayer(HomeAccessory):
             self.chars[FEATURE_TOGGLE_MUTE] = serv_toggle_mute.configure_char(
                 CHAR_ON, value=False, setter_callback=self.set_toggle_mute
             )
-        self.update_state(state)
+        self.async_update_state(state)
 
     def generate_service_name(self, mode):
         """Generate name for individual service."""
@@ -189,7 +190,8 @@ class MediaPlayer(HomeAccessory):
         params = {ATTR_ENTITY_ID: self.entity_id, ATTR_MEDIA_VOLUME_MUTED: value}
         self.call_service(DOMAIN, SERVICE_VOLUME_MUTE, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update switch state after state changed."""
         current_state = new_state.state
 
@@ -321,7 +323,7 @@ class TelevisionMediaPlayer(HomeAccessory):
                 serv_input.configure_char(CHAR_CURRENT_VISIBILITY_STATE, value=False)
                 _LOGGER.debug("%s: Added source %s.", self.entity_id, source)
 
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_on_off(self, value):
         """Move switch state to value if call came from HomeKit."""
@@ -375,7 +377,8 @@ class TelevisionMediaPlayer(HomeAccessory):
             params = {ATTR_ENTITY_ID: self.entity_id}
             self.call_service(DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update Television state after state changed."""
         current_state = new_state.state
 
diff --git a/homeassistant/components/homekit/type_security_systems.py b/homeassistant/components/homekit/type_security_systems.py
index 8a2bb971cf1..7d8dcac046d 100644
--- a/homeassistant/components/homekit/type_security_systems.py
+++ b/homeassistant/components/homekit/type_security_systems.py
@@ -17,6 +17,7 @@ from homeassistant.const import (
     STATE_ALARM_DISARMED,
     STATE_ALARM_TRIGGERED,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -64,7 +65,7 @@ class SecuritySystem(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_security_state(self, value):
         """Move security state to value if call came from HomeKit."""
@@ -77,7 +78,8 @@ class SecuritySystem(HomeAccessory):
             params[ATTR_CODE] = self._alarm_code
         self.call_service(DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update security state after state changed."""
         hass_state = new_state.state
         if hass_state in HASS_TO_HOMEKIT:
diff --git a/homeassistant/components/homekit/type_sensors.py b/homeassistant/components/homekit/type_sensors.py
index c37755bc1c5..28c7ea26009 100644
--- a/homeassistant/components/homekit/type_sensors.py
+++ b/homeassistant/components/homekit/type_sensors.py
@@ -10,6 +10,7 @@ from homeassistant.const import (
     STATE_ON,
     TEMP_CELSIUS,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -89,9 +90,10 @@ class TemperatureSensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update temperature after state changed."""
         unit = new_state.attributes.get(ATTR_UNIT_OF_MEASUREMENT, TEMP_CELSIUS)
         temperature = convert_to_float(new_state.state)
@@ -118,9 +120,10 @@ class HumiditySensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         humidity = convert_to_float(new_state.state)
         if humidity and self.char_humidity.value != humidity:
@@ -145,9 +148,10 @@ class AirQualitySensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         density = convert_to_float(new_state.state)
         if density:
@@ -181,9 +185,10 @@ class CarbonMonoxideSensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         value = convert_to_float(new_state.state)
         if value:
@@ -218,9 +223,10 @@ class CarbonDioxideSensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         value = convert_to_float(new_state.state)
         if value:
@@ -248,9 +254,10 @@ class LightSensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         luminance = convert_to_float(new_state.state)
         if luminance and self.char_light.value != luminance:
@@ -281,9 +288,10 @@ class BinarySensor(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update accessory after state change."""
         state = new_state.state
         detected = self.format(state in (STATE_ON, STATE_HOME))
diff --git a/homeassistant/components/homekit/type_switches.py b/homeassistant/components/homekit/type_switches.py
index 072c8681a50..635b0e1d036 100644
--- a/homeassistant/components/homekit/type_switches.py
+++ b/homeassistant/components/homekit/type_switches.py
@@ -24,7 +24,7 @@ from homeassistant.const import (
     SERVICE_TURN_ON,
     STATE_ON,
 )
-from homeassistant.core import split_entity_id
+from homeassistant.core import callback, split_entity_id
 from homeassistant.helpers.event import call_later
 
 from .accessories import TYPES, HomeAccessory
@@ -71,7 +71,7 @@ class Outlet(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_state(self, value):
         """Move switch state to value if call came from HomeKit."""
@@ -80,7 +80,8 @@ class Outlet(HomeAccessory):
         service = SERVICE_TURN_ON if value else SERVICE_TURN_OFF
         self.call_service(DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update switch state after state changed."""
         current_state = new_state.state == STATE_ON
         if self.char_on.value is not current_state:
@@ -106,7 +107,7 @@ class Switch(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
     def is_activate(self, state):
         """Check if entity is activate only."""
@@ -136,7 +137,8 @@ class Switch(HomeAccessory):
         if self.activate_only:
             call_later(self.hass, 1, self.reset_switch)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update switch state after state changed."""
         self.activate_only = self.is_activate(new_state)
         if self.activate_only:
@@ -162,7 +164,8 @@ class DockVacuum(Switch):
         service = SERVICE_START if value else SERVICE_RETURN_TO_BASE
         self.call_service(VACUUM_DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update switch state after state changed."""
         current_state = new_state.state in (STATE_CLEANING, STATE_ON)
         if self.char_on.value is not current_state:
@@ -191,7 +194,7 @@ class Valve(HomeAccessory):
         )
         # Set the state so it is in sync on initial
         # GET to avoid an event storm after homekit startup
-        self.update_state(state)
+        self.async_update_state(state)
 
     def set_state(self, value):
         """Move value state to value if call came from HomeKit."""
@@ -201,7 +204,8 @@ class Valve(HomeAccessory):
         service = SERVICE_TURN_ON if value else SERVICE_TURN_OFF
         self.call_service(DOMAIN, service, params)
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update switch state after state changed."""
         current_state = 1 if new_state.state == STATE_ON else 0
         if self.char_active.value != current_state:
diff --git a/homeassistant/components/homekit/type_thermostats.py b/homeassistant/components/homekit/type_thermostats.py
index 84cefced602..c202191cb7e 100644
--- a/homeassistant/components/homekit/type_thermostats.py
+++ b/homeassistant/components/homekit/type_thermostats.py
@@ -51,6 +51,7 @@ from homeassistant.const import (
     TEMP_FAHRENHEIT,
     UNIT_PERCENTAGE,
 )
+from homeassistant.core import callback
 
 from .accessories import TYPES, HomeAccessory
 from .const import (
@@ -220,7 +221,7 @@ class Thermostat(HomeAccessory):
                 CHAR_CURRENT_HUMIDITY, value=50
             )
 
-        self._update_state(state)
+        self._async_update_state(state)
 
         serv_thermostat.setter_callback = self._set_chars
 
@@ -391,7 +392,8 @@ class Thermostat(HomeAccessory):
             DOMAIN_CLIMATE, SERVICE_SET_HUMIDITY, params, f"{value}{UNIT_PERCENTAGE}"
         )
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update thermostat state after state changed."""
         if self._state_updates < 3:
             # When we get the first state updates
@@ -414,9 +416,10 @@ class Thermostat(HomeAccessory):
                 )
             self._state_updates += 1
 
-        self._update_state(new_state)
+        self._async_update_state(new_state)
 
-    def _update_state(self, new_state):
+    @callback
+    def _async_update_state(self, new_state):
         """Update state without rechecking the device features."""
         features = new_state.attributes.get(ATTR_SUPPORTED_FEATURES, 0)
 
@@ -544,7 +547,7 @@ class WaterHeater(HomeAccessory):
         )
 
         state = self.hass.states.get(self.entity_id)
-        self.update_state(state)
+        self.async_update_state(state)
 
     def get_temperature_range(self):
         """Return min and max temperature range."""
@@ -586,7 +589,8 @@ class WaterHeater(HomeAccessory):
             f"{temperature}{self._unit}",
         )
 
-    def update_state(self, new_state):
+    @callback
+    def async_update_state(self, new_state):
         """Update water_heater state after state change."""
         # Update current and target temperature
         temperature = new_state.attributes.get(ATTR_TEMPERATURE)
diff --git a/tests/components/homekit/test_accessories.py b/tests/components/homekit/test_accessories.py
index 55b7f764d76..036d30b0edd 100644
--- a/tests/components/homekit/test_accessories.py
+++ b/tests/components/homekit/test_accessories.py
@@ -100,19 +100,19 @@ async def test_home_accessory(hass, hk_driver):
     hass.states.async_set(entity_id, "on")
     await hass.async_block_till_done()
     with patch(
-        "homeassistant.components.homekit.accessories.HomeAccessory.update_state"
-    ) as mock_update_state:
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
         await acc.run_handler()
         await hass.async_block_till_done()
         state = hass.states.get(entity_id)
-        mock_update_state.assert_called_with(state)
+        mock_async_update_state.assert_called_with(state)
 
         hass.states.async_remove(entity_id)
         await hass.async_block_till_done()
-        assert mock_update_state.call_count == 1
+        assert mock_async_update_state.call_count == 1
 
     with pytest.raises(NotImplementedError):
-        acc.update_state("new_state")
+        acc.async_update_state("new_state")
 
     # Test model name from domain
     entity_id = "test_model.demo"
@@ -130,52 +130,82 @@ async def test_battery_service(hass, hk_driver, caplog):
     await hass.async_block_till_done()
 
     acc = HomeAccessory(hass, hk_driver, "Battery Service", entity_id, 2, None)
-    acc.update_state = lambda x: None
     assert acc._char_battery.value == 0
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 2
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
+
     assert acc._char_battery.value == 50
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 2
 
-    hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: 15})
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: 15})
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 15
     assert acc._char_low_battery.value == 1
     assert acc._char_charging.value == 2
 
-    hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: "error"})
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: "error"})
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 15
     assert acc._char_low_battery.value == 1
     assert acc._char_charging.value == 2
     assert "ERROR" not in caplog.text
 
     # Test charging
-    hass.states.async_set(
-        entity_id, None, {ATTR_BATTERY_LEVEL: 10, ATTR_BATTERY_CHARGING: True}
-    )
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        hass.states.async_set(
+            entity_id, None, {ATTR_BATTERY_LEVEL: 10, ATTR_BATTERY_CHARGING: True}
+        )
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
 
-    acc = HomeAccessory(hass, hk_driver, "Battery Service", entity_id, 2, None)
-    acc.update_state = lambda x: None
-    assert acc._char_battery.value == 0
-    assert acc._char_low_battery.value == 0
-    assert acc._char_charging.value == 2
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ):
+        acc = HomeAccessory(hass, hk_driver, "Battery Service", entity_id, 2, None)
+        assert acc._char_battery.value == 0
+        assert acc._char_low_battery.value == 0
+        assert acc._char_charging.value == 2
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 10
     assert acc._char_low_battery.value == 1
     assert acc._char_charging.value == 1
 
-    hass.states.async_set(
-        entity_id, None, {ATTR_BATTERY_LEVEL: 100, ATTR_BATTERY_CHARGING: False}
-    )
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ):
+        hass.states.async_set(
+            entity_id, None, {ATTR_BATTERY_LEVEL: 100, ATTR_BATTERY_CHARGING: False}
+        )
+        await hass.async_block_till_done()
     assert acc._char_battery.value == 100
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 0
@@ -197,11 +227,15 @@ async def test_linked_battery_sensor(hass, hk_driver, caplog):
         2,
         {CONF_LINKED_BATTERY_SENSOR: linked_battery},
     )
-    acc.update_state = lambda x: None
     assert acc.linked_battery_sensor == linked_battery
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 50
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 2
@@ -212,13 +246,19 @@ async def test_linked_battery_sensor(hass, hk_driver, caplog):
     assert acc._char_low_battery.value == 1
 
     # Ignore battery change on entity if it has linked_battery
-    hass.states.async_set(entity_id, "open", {ATTR_BATTERY_LEVEL: 90})
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ):
+        hass.states.async_set(entity_id, "open", {ATTR_BATTERY_LEVEL: 90})
+        await hass.async_block_till_done()
     assert acc._char_battery.value == 10
 
     # Test none numeric state for linked_battery
-    hass.states.async_set(linked_battery, "error", None)
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ):
+        hass.states.async_set(linked_battery, "error", None)
+        await hass.async_block_till_done()
     assert acc._char_battery.value == 10
     assert "ERROR" not in caplog.text
 
@@ -234,15 +274,20 @@ async def test_linked_battery_sensor(hass, hk_driver, caplog):
         2,
         {CONF_LINKED_BATTERY_SENSOR: linked_battery, CONF_LOW_BATTERY_THRESHOLD: 50},
     )
-    acc.update_state = lambda x: None
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 20
     assert acc._char_low_battery.value == 1
     assert acc._char_charging.value == 1
 
     hass.states.async_set(linked_battery, 100, {ATTR_BATTERY_CHARGING: False})
     await hass.async_block_till_done()
+    state = hass.states.get(entity_id)
     assert acc._char_battery.value == 100
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 0
@@ -264,23 +309,37 @@ async def test_linked_battery_charging_sensor(hass, hk_driver, caplog):
         2,
         {CONF_LINKED_BATTERY_CHARGING_SENSOR: linked_battery_charging_sensor},
     )
-    acc.update_state = lambda x: None
     assert acc.linked_battery_charging_sensor == linked_battery_charging_sensor
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 100
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 1
 
-    hass.states.async_set(linked_battery_charging_sensor, STATE_OFF, None)
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        hass.states.async_set(linked_battery_charging_sensor, STATE_OFF, None)
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_charging.value == 0
 
-    hass.states.async_set(linked_battery_charging_sensor, STATE_ON, None)
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        hass.states.async_set(linked_battery_charging_sensor, STATE_ON, None)
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_charging.value == 1
 
 
@@ -307,11 +366,15 @@ async def test_linked_battery_sensor_and_linked_battery_charging_sensor(
             CONF_LINKED_BATTERY_CHARGING_SENSOR: linked_battery_charging_sensor,
         },
     )
-    acc.update_state = lambda x: None
     assert acc.linked_battery_sensor == linked_battery
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery.value == 50
     assert acc._char_low_battery.value == 0
     assert acc._char_charging.value == 1
@@ -356,11 +419,15 @@ async def test_missing_linked_battery_sensor(hass, hk_driver, caplog):
         2,
         {CONF_LINKED_BATTERY_SENSOR: linked_battery},
     )
-    acc.update_state = lambda x: None
     assert not acc.linked_battery_sensor
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
 
     assert not acc.linked_battery_sensor
     assert acc._char_battery is None
@@ -377,15 +444,22 @@ async def test_battery_appears_after_startup(hass, hk_driver, caplog):
     acc = HomeAccessory(
         hass, hk_driver, "Accessory without battery", entity_id, 2, None
     )
-    acc.update_state = lambda x: None
     assert acc._char_battery is None
 
-    await acc.run_handler()
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ) as mock_async_update_state:
+        await acc.run_handler()
+        await hass.async_block_till_done()
+        state = hass.states.get(entity_id)
+        mock_async_update_state.assert_called_with(state)
     assert acc._char_battery is None
 
-    hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: 15})
-    await hass.async_block_till_done()
+    with patch(
+        "homeassistant.components.homekit.accessories.HomeAccessory.async_update_state"
+    ):
+        hass.states.async_set(entity_id, None, {ATTR_BATTERY_LEVEL: 15})
+        await hass.async_block_till_done()
     assert acc._char_battery is None
 
 
diff --git a/tests/components/homekit/test_type_cameras.py b/tests/components/homekit/test_type_cameras.py
index 81dfb9410f0..903b1808463 100644
--- a/tests/components/homekit/test_type_cameras.py
+++ b/tests/components/homekit/test_type_cameras.py
@@ -30,6 +30,27 @@ MOCK_END_POINTS_TLV = "ARAzA9UDF8xGmrZykkNqcaL2AgEAAxoBAQACDTE5Mi4xNjguMjA4LjUDA
 MOCK_START_STREAM_SESSION_UUID = UUID("3303d503-17cc-469a-b672-92436a71a2f6")
 
 
+async def _async_start_streaming(hass, acc):
+    """Start streaming a camera."""
+    acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
+    await acc.run_handler()
+    await hass.async_block_till_done()
+
+
+async def _async_setup_endpoints(hass, acc):
+    """Set camera endpoints."""
+    acc.set_endpoints(MOCK_END_POINTS_TLV)
+    await acc.run_handler()
+    await hass.async_block_till_done()
+
+
+async def _async_stop_stream(hass, acc):
+    """Stop a camera stream."""
+    await acc.stop()
+    await acc.run_handler()
+    await hass.async_block_till_done()
+
+
 @pytest.fixture()
 def run_driver(hass):
     """Return a custom AccessoryDriver instance for HomeKit accessory init."""
@@ -92,9 +113,9 @@ async def test_camera_stream_source_configured(hass, run_driver, events):
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
-    session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
+    await _async_setup_endpoints(hass, acc)
     working_ffmpeg = _get_working_mock_ffmpeg()
+    session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
 
     with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
@@ -103,8 +124,8 @@ async def test_camera_stream_source_configured(hass, run_driver, events):
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=working_ffmpeg,
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await hass.async_block_till_done()
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
 
     expected_output = (
         "-map 0:v:0 -an -c:v libx264 -profile:v high -tune zerolatency -pix_fmt "
@@ -132,11 +153,10 @@ async def test_camera_stream_source_configured(hass, run_driver, events):
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=working_ffmpeg,
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
         # Calling a second time should not throw
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_stop_stream(hass, acc)
 
     turbo_jpeg = mock_turbo_jpeg(
         first_width=16, first_height=12, second_width=300, second_height=200
@@ -195,8 +215,7 @@ async def test_camera_stream_source_configured_with_failing_ffmpeg(
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
-    session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
+    await _async_setup_endpoints(hass, acc)
 
     with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
@@ -205,11 +224,10 @@ async def test_camera_stream_source_configured_with_failing_ffmpeg(
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=_get_failing_mock_ffmpeg(),
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
         # Calling a second time should not throw
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_stop_stream(hass, acc)
 
 
 async def test_camera_stream_source_found(hass, run_driver, events):
@@ -229,8 +247,7 @@ async def test_camera_stream_source_found(hass, run_driver, events):
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
-    session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
+    await _async_setup_endpoints(hass, acc)
 
     with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
@@ -239,9 +256,8 @@ async def test_camera_stream_source_found(hass, run_driver, events):
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=_get_working_mock_ffmpeg(),
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
 
     with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
@@ -250,9 +266,8 @@ async def test_camera_stream_source_found(hass, run_driver, events):
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=_get_working_mock_ffmpeg(),
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
 
 
 async def test_camera_stream_source_fails(hass, run_driver, events):
@@ -272,8 +287,7 @@ async def test_camera_stream_source_fails(hass, run_driver, events):
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
-    session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
+    await _async_setup_endpoints(hass, acc)
 
     with patch(
         "homeassistant.components.demo.camera.DemoCamera.stream_source",
@@ -282,9 +296,8 @@ async def test_camera_stream_source_fails(hass, run_driver, events):
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=_get_working_mock_ffmpeg(),
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
 
 
 async def test_camera_with_no_stream(hass, run_driver, events):
@@ -302,9 +315,9 @@ async def test_camera_with_no_stream(hass, run_driver, events):
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
-    acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-    await hass.async_block_till_done()
+    await _async_setup_endpoints(hass, acc)
+    await _async_start_streaming(hass, acc)
+    await _async_stop_stream(hass, acc)
 
     with pytest.raises(HomeAssistantError):
         await hass.async_add_executor_job(
@@ -344,7 +357,7 @@ async def test_camera_stream_source_configured_and_copy_codec(hass, run_driver,
     assert acc.aid == 2
     assert acc.category == 17  # Camera
 
-    acc.set_endpoints(MOCK_END_POINTS_TLV)
+    await _async_setup_endpoints(hass, acc)
     session_info = acc.sessions[MOCK_START_STREAM_SESSION_UUID]
 
     working_ffmpeg = _get_working_mock_ffmpeg()
@@ -356,9 +369,8 @@ async def test_camera_stream_source_configured_and_copy_codec(hass, run_driver,
         "homeassistant.components.homekit.type_cameras.HAFFmpeg",
         return_value=working_ffmpeg,
     ):
-        acc.set_selected_stream_configuration(MOCK_START_STREAM_TLV)
-        await acc.stop_stream(session_info)
-        await hass.async_block_till_done()
+        await _async_start_streaming(hass, acc)
+        await _async_stop_stream(hass, acc)
 
     expected_output = (
         "-map 0:v:0 -an -c:v copy -tune zerolatency -pix_fmt yuv420p -r 30 -b:v 299k "