diff --git a/homeassistant/components/plugwise/config_flow.py b/homeassistant/components/plugwise/config_flow.py
index 1dbf4324590..eaf728aa801 100644
--- a/homeassistant/components/plugwise/config_flow.py
+++ b/homeassistant/components/plugwise/config_flow.py
@@ -1,4 +1,6 @@
 """Config flow for Plugwise integration."""
+from __future__ import annotations
+
 import logging
 
 from plugwise.exceptions import InvalidAuthentication, PlugwiseException
@@ -6,6 +8,7 @@ from plugwise.smile import Smile
 import voluptuous as vol
 
 from homeassistant import config_entries, core, exceptions
+from homeassistant.components import zeroconf
 from homeassistant.const import (
     CONF_BASE,
     CONF_HOST,
@@ -16,8 +19,8 @@ from homeassistant.const import (
     CONF_USERNAME,
 )
 from homeassistant.core import callback
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
-from homeassistant.helpers.typing import DiscoveryInfoType
 
 from .const import (
     API,
@@ -98,30 +101,34 @@ class PlugwiseConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     def __init__(self):
         """Initialize the Plugwise config flow."""
-        self.discovery_info = {}
+        self.discovery_info: zeroconf.ZeroconfServiceInfo | None = None
+        self._username: str = DEFAULT_USERNAME
 
-    async def async_step_zeroconf(self, discovery_info: DiscoveryInfoType):
+    async def async_step_zeroconf(
+        self, discovery_info: zeroconf.ZeroconfServiceInfo
+    ) -> FlowResult:
         """Prepare configuration for a discovered Plugwise Smile."""
         self.discovery_info = discovery_info
-        self.discovery_info[CONF_USERNAME] = DEFAULT_USERNAME
-        _properties = self.discovery_info.get("properties")
+        _properties = discovery_info[zeroconf.ATTR_PROPERTIES]
 
         # unique_id is needed here, to be able to determine whether the discovered device is known, or not.
-        unique_id = self.discovery_info.get("hostname").split(".")[0]
+        unique_id = discovery_info[zeroconf.ATTR_HOSTNAME].split(".")[0]
         await self.async_set_unique_id(unique_id)
-        self._abort_if_unique_id_configured({CONF_HOST: self.discovery_info[CONF_HOST]})
+        self._abort_if_unique_id_configured(
+            {CONF_HOST: discovery_info[zeroconf.ATTR_HOST]}
+        )
 
         if DEFAULT_USERNAME not in unique_id:
-            self.discovery_info[CONF_USERNAME] = STRETCH_USERNAME
+            self._username = STRETCH_USERNAME
         _product = _properties.get("product", None)
         _version = _properties.get("version", "n/a")
         _name = f"{ZEROCONF_MAP.get(_product, _product)} v{_version}"
 
         self.context["title_placeholders"] = {
-            CONF_HOST: self.discovery_info[CONF_HOST],
+            CONF_HOST: discovery_info[zeroconf.ATTR_HOST],
             CONF_NAME: _name,
-            CONF_PORT: self.discovery_info[CONF_PORT],
-            CONF_USERNAME: self.discovery_info[CONF_USERNAME],
+            CONF_PORT: discovery_info[zeroconf.ATTR_PORT],
+            CONF_USERNAME: self._username,
         }
         return await self.async_step_user_gateway()
 
@@ -136,9 +143,9 @@ class PlugwiseConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             user_input.pop(FLOW_TYPE, None)
 
             if self.discovery_info:
-                user_input[CONF_HOST] = self.discovery_info[CONF_HOST]
-                user_input[CONF_PORT] = self.discovery_info[CONF_PORT]
-                user_input[CONF_USERNAME] = self.discovery_info[CONF_USERNAME]
+                user_input[CONF_HOST] = self.discovery_info[zeroconf.ATTR_HOST]
+                user_input[CONF_PORT] = self.discovery_info[zeroconf.ATTR_PORT]
+                user_input[CONF_USERNAME] = self._username
 
             try:
                 api = await validate_gw_input(self.hass, user_input)
diff --git a/tests/components/plugwise/test_config_flow.py b/tests/components/plugwise/test_config_flow.py
index 7f270e23cc1..72e695a4e9c 100644
--- a/tests/components/plugwise/test_config_flow.py
+++ b/tests/components/plugwise/test_config_flow.py
@@ -8,6 +8,7 @@ from plugwise.exceptions import (
 )
 import pytest
 
+from homeassistant.components import zeroconf
 from homeassistant.components.plugwise.const import (
     API,
     DEFAULT_PORT,
@@ -39,28 +40,28 @@ TEST_PORT = 81
 TEST_USERNAME = "smile"
 TEST_USERNAME2 = "stretch"
 
-TEST_DISCOVERY = {
-    "host": TEST_HOST,
-    "port": DEFAULT_PORT,
-    "hostname": f"{TEST_HOSTNAME}.local.",
-    "server": f"{TEST_HOSTNAME}.local.",
-    "properties": {
+TEST_DISCOVERY = zeroconf.ZeroconfServiceInfo(
+    host=TEST_HOST,
+    port=DEFAULT_PORT,
+    hostname=f"{TEST_HOSTNAME}.local.",
+    server=f"{TEST_HOSTNAME}.local.",
+    properties={
         "product": "smile",
         "version": "1.2.3",
         "hostname": f"{TEST_HOSTNAME}.local.",
     },
-}
-TEST_DISCOVERY2 = {
-    "host": TEST_HOST,
-    "port": DEFAULT_PORT,
-    "hostname": f"{TEST_HOSTNAME2}.local.",
-    "server": f"{TEST_HOSTNAME2}.local.",
-    "properties": {
+)
+TEST_DISCOVERY2 = zeroconf.ZeroconfServiceInfo(
+    host=TEST_HOST,
+    port=DEFAULT_PORT,
+    hostname=f"{TEST_HOSTNAME2}.local.",
+    server=f"{TEST_HOSTNAME2}.local.",
+    properties={
         "product": "stretch",
         "version": "1.2.3",
         "hostname": f"{TEST_HOSTNAME2}.local.",
     },
-}
+)
 
 
 @pytest.fixture(name="mock_smile")