diff --git a/homeassistant/components/bluesound/media_player.py b/homeassistant/components/bluesound/media_player.py
index cb6f013dbf8..6c63067a1c1 100644
--- a/homeassistant/components/bluesound/media_player.py
+++ b/homeassistant/components/bluesound/media_player.py
@@ -934,7 +934,7 @@ class BluesoundPlayer(MediaPlayerEntity):
         selected_source = items[0]
         url = f"Play?url={selected_source['url']}&preset_id&image={selected_source['image']}"
 
-        if "is_raw_url" in selected_source and selected_source["is_raw_url"]:
+        if selected_source.get("is_raw_url"):
             url = selected_source["url"]
 
         return await self.send_bluesound_command(url)
diff --git a/homeassistant/components/isy994/light.py b/homeassistant/components/isy994/light.py
index 69701534840..b9b269d9ca3 100644
--- a/homeassistant/components/isy994/light.py
+++ b/homeassistant/components/isy994/light.py
@@ -114,8 +114,5 @@ class ISYLightEntity(ISYNodeEntity, LightEntity, RestoreEntity):
         if not (last_state := await self.async_get_last_state()):
             return
 
-        if (
-            ATTR_LAST_BRIGHTNESS in last_state.attributes
-            and last_state.attributes[ATTR_LAST_BRIGHTNESS]
-        ):
-            self._last_brightness = last_state.attributes[ATTR_LAST_BRIGHTNESS]
+        if last_brightness := last_state.attributes.get(ATTR_LAST_BRIGHTNESS):
+            self._last_brightness = last_brightness
diff --git a/homeassistant/components/tado/__init__.py b/homeassistant/components/tado/__init__.py
index 5ab7a6f67b8..8f69ccdaffb 100644
--- a/homeassistant/components/tado/__init__.py
+++ b/homeassistant/components/tado/__init__.py
@@ -221,7 +221,7 @@ class TadoConnector:
 
         # Errors are planned to be converted to exceptions
         # in PyTado library, so this can be removed
-        if "errors" in mobile_devices and mobile_devices["errors"]:
+        if isinstance(mobile_devices, dict) and mobile_devices.get("errors"):
             _LOGGER.error(
                 "Error for home ID %s while updating mobile devices: %s",
                 self.home_id,
@@ -256,7 +256,7 @@ class TadoConnector:
 
         # Errors are planned to be converted to exceptions
         # in PyTado library, so this can be removed
-        if "errors" in devices and devices["errors"]:
+        if isinstance(devices, dict) and devices.get("errors"):
             _LOGGER.error(
                 "Error for home ID %s while updating devices: %s",
                 self.home_id,
diff --git a/homeassistant/components/velbus/__init__.py b/homeassistant/components/velbus/__init__.py
index ea03c4b15f1..479b7f02024 100644
--- a/homeassistant/components/velbus/__init__.py
+++ b/homeassistant/components/velbus/__init__.py
@@ -145,7 +145,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         """Handle a clear cache service call."""
         # clear the cache
         with suppress(FileNotFoundError):
-            if CONF_ADDRESS in call.data and call.data[CONF_ADDRESS]:
+            if call.data.get(CONF_ADDRESS):
                 await hass.async_add_executor_job(
                     os.unlink,
                     hass.config.path(
diff --git a/homeassistant/components/xiaomi_miio/remote.py b/homeassistant/components/xiaomi_miio/remote.py
index cd3b3192520..5baaf614b01 100644
--- a/homeassistant/components/xiaomi_miio/remote.py
+++ b/homeassistant/components/xiaomi_miio/remote.py
@@ -138,8 +138,8 @@ async def async_setup_platform(
             message = await hass.async_add_executor_job(device.read, slot)
             _LOGGER.debug("Message received from device: '%s'", message)
 
-            if "code" in message and message["code"]:
-                log_msg = "Received command is: {}".format(message["code"])
+            if code := message.get("code"):
+                log_msg = f"Received command is: {code}"
                 _LOGGER.info(log_msg)
                 persistent_notification.async_create(
                     hass, log_msg, title="Xiaomi Miio Remote"
diff --git a/homeassistant/helpers/config_validation.py b/homeassistant/helpers/config_validation.py
index 38287eb6722..bf20a2d7f5f 100644
--- a/homeassistant/helpers/config_validation.py
+++ b/homeassistant/helpers/config_validation.py
@@ -1106,7 +1106,7 @@ def empty_config_schema(domain: str) -> Callable[[dict], dict]:
     """Return a config schema which logs if there are configuration parameters."""
 
     def validator(config: dict) -> dict:
-        if domain in config and config[domain]:
+        if config_domain := config.get(domain):
             get_integration_logger(__name__).error(
                 (
                     "The %s integration does not support any configuration parameters, "
@@ -1114,7 +1114,7 @@ def empty_config_schema(domain: str) -> Callable[[dict], dict]:
                     "configuration."
                 ),
                 domain,
-                config[domain],
+                config_domain,
             )
         return config
 
diff --git a/pyproject.toml b/pyproject.toml
index d3487d50a17..7e3038f6ee2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -705,6 +705,7 @@ select = [
     "RUF006", # Store a reference to the return value of asyncio.create_task
     "RUF013", # PEP 484 prohibits implicit Optional
     "RUF018", # Avoid assignment expressions in assert statements
+    "RUF019", # Unnecessary key check before dictionary access
     # "RUF100", # Unused `noqa` directive; temporarily every now and then to clean them up
     "S102", # Use of exec detected
     "S103", # bad-file-permissions