diff --git a/homeassistant/components/iperf3/sensor.py b/homeassistant/components/iperf3/sensor.py
index 4e102b69782..b06c3584c56 100644
--- a/homeassistant/components/iperf3/sensor.py
+++ b/homeassistant/components/iperf3/sensor.py
@@ -1,9 +1,13 @@
 """Support for Iperf3 sensors."""
+from __future__ import annotations
+
 from homeassistant.components.sensor import SensorEntity, SensorEntityDescription
 from homeassistant.const import ATTR_ATTRIBUTION
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.restore_state import RestoreEntity
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import ATTR_VERSION, DATA_UPDATED, DOMAIN as IPERF3_DOMAIN, SENSOR_TYPES
 
@@ -16,8 +20,16 @@ ATTR_REMOTE_HOST = "Remote Server"
 ATTR_REMOTE_PORT = "Remote Port"
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Iperf3 sensor."""
+    if not discovery_info:
+        return
+
     entities = [
         Iperf3Sensor(iperf3_host, description)
         for iperf3_host in hass.data[IPERF3_DOMAIN].values()