diff --git a/esphome/components/text_sensor/__init__.py b/esphome/components/text_sensor/__init__.py
index cf7d23aec7..6c28b57b3d 100644
--- a/esphome/components/text_sensor/__init__.py
+++ b/esphome/components/text_sensor/__init__.py
@@ -186,8 +186,8 @@ async def build_filters(config):
 async def setup_text_sensor_core_(var, config):
     await setup_entity(var, config)
 
-    if CONF_DEVICE_CLASS in config:
-        cg.add(var.set_device_class(config[CONF_DEVICE_CLASS]))
+    if (device_class := config.get(CONF_DEVICE_CLASS)) is not None:
+        cg.add(var.set_device_class(device_class))
 
     if config.get(CONF_FILTERS):  # must exist and not be empty
         filters = await build_filters(config[CONF_FILTERS])
@@ -201,8 +201,8 @@ async def setup_text_sensor_core_(var, config):
         trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID], var)
         await automation.build_automation(trigger, [(cg.std_string, "x")], conf)
 
-    if CONF_MQTT_ID in config:
-        mqtt_ = cg.new_Pvariable(config[CONF_MQTT_ID], var)
+    if (mqtt_id := config.get(CONF_MQTT_ID)) is not None:
+        mqtt_ = cg.new_Pvariable(mqtt_id, var)
         await mqtt.register_mqtt_component(mqtt_, config)