diff --git a/homeassistant/components/garadget/cover.py b/homeassistant/components/garadget/cover.py
index 96ebe698605..826f21e9f88 100644
--- a/homeassistant/components/garadget/cover.py
+++ b/homeassistant/components/garadget/cover.py
@@ -233,7 +233,7 @@ class GaradgetCover(CoverEntity):
             self._start_watcher("stop")
             return ret["return_value"] == 1
 
-    def update(self):
+    def update(self) -> None:
         """Get updated status from API."""
         try:
             status = self._get_variable("doorStatus")
diff --git a/homeassistant/components/lutron/cover.py b/homeassistant/components/lutron/cover.py
index fa62ef3745a..65a1c737d55 100644
--- a/homeassistant/components/lutron/cover.py
+++ b/homeassistant/components/lutron/cover.py
@@ -66,7 +66,7 @@ class LutronCover(LutronDevice, CoverEntity):
             position = kwargs[ATTR_POSITION]
             self._lutron_device.level = position
 
-    def update(self):
+    def update(self) -> None:
         """Call when forcing a refresh of the device."""
         # Reading the property (rather than last_level()) fetches value
         level = self._lutron_device.level
diff --git a/homeassistant/components/soma/cover.py b/homeassistant/components/soma/cover.py
index 0130b0ca7b1..116f88aa20e 100644
--- a/homeassistant/components/soma/cover.py
+++ b/homeassistant/components/soma/cover.py
@@ -102,7 +102,7 @@ class SomaTilt(SomaEntity, CoverEntity):
             )
         self.set_position(kwargs[ATTR_TILT_POSITION])
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Update the entity with the latest data."""
         response = await self.get_shade_state_from_api()
 
@@ -172,7 +172,7 @@ class SomaShade(SomaEntity, CoverEntity):
                 f'Error while setting the cover position ({self.name}): {response["msg"]}'
             )
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Update the cover with the latest data."""
         response = await self.get_shade_state_from_api()
 
diff --git a/homeassistant/components/zha/cover.py b/homeassistant/components/zha/cover.py
index 6ade62343b1..f6c67e6981d 100644
--- a/homeassistant/components/zha/cover.py
+++ b/homeassistant/components/zha/cover.py
@@ -162,7 +162,7 @@ class ZhaCover(ZhaEntity, CoverEntity):
             self._state = STATE_OPEN if self._current_position > 0 else STATE_CLOSED
             self.async_write_ha_state()
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Attempt to retrieve the open/close state of the cover."""
         await super().async_update()
         await self.async_get_state()
diff --git a/homeassistant/components/zha/fan.py b/homeassistant/components/zha/fan.py
index 3b9793c5137..8e24427b679 100644
--- a/homeassistant/components/zha/fan.py
+++ b/homeassistant/components/zha/fan.py
@@ -202,7 +202,7 @@ class FanGroup(BaseFan, ZhaGroupEntity):
             self.error("Could not set fan mode: %s", ex)
         self.async_set_state(0, "fan_mode", fan_mode)
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Attempt to retrieve on off state from the fan."""
         all_states = [self.hass.states.get(x) for x in self._entity_ids]
         states: list[State] = list(filter(None, all_states))
diff --git a/homeassistant/components/zha/lock.py b/homeassistant/components/zha/lock.py
index 6615141f4d1..a2ec5e068cb 100644
--- a/homeassistant/components/zha/lock.py
+++ b/homeassistant/components/zha/lock.py
@@ -137,7 +137,7 @@ class ZhaDoorLock(ZhaEntity, LockEntity):
             return
         self.async_write_ha_state()
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Attempt to retrieve state from the lock."""
         await super().async_update()
         await self.async_get_state()