diff --git a/tests/components/devolo_home_network/__init__.py b/tests/components/devolo_home_network/__init__.py
index b9026d8453b..913193be3f7 100644
--- a/tests/components/devolo_home_network/__init__.py
+++ b/tests/components/devolo_home_network/__init__.py
@@ -1,5 +1,6 @@
 """Tests for the devolo Home Network integration."""
 
+import dataclasses
 from typing import Any
 
 from devolo_plc_api.device_api.deviceapi import DeviceApi
@@ -27,5 +28,5 @@ def configure_integration(hass: HomeAssistant) -> MockConfigEntry:
 
 async def async_connect(self, session_instance: Any = None):
     """Give a mocked device the needed properties."""
-    self.plcnet = PlcNetApi(IP, None, DISCOVERY_INFO)
-    self.device = DeviceApi(IP, None, DISCOVERY_INFO)
+    self.plcnet = PlcNetApi(IP, None, dataclasses.asdict(DISCOVERY_INFO))
+    self.device = DeviceApi(IP, None, dataclasses.asdict(DISCOVERY_INFO))
diff --git a/tests/components/devolo_home_network/conftest.py b/tests/components/devolo_home_network/conftest.py
index 255a9ec1f7c..1d8d2a6da19 100644
--- a/tests/components/devolo_home_network/conftest.py
+++ b/tests/components/devolo_home_network/conftest.py
@@ -30,8 +30,8 @@ def mock_device():
 def mock_validate_input():
     """Mock setup entry and user input."""
     info = {
-        "serial_number": DISCOVERY_INFO["properties"]["SN"],
-        "title": DISCOVERY_INFO["properties"]["Product"],
+        "serial_number": DISCOVERY_INFO.properties["SN"],
+        "title": DISCOVERY_INFO.properties["Product"],
     }
 
     with patch(
diff --git a/tests/components/devolo_home_network/test_config_flow.py b/tests/components/devolo_home_network/test_config_flow.py
index 1af3c39bca2..7d115a26b15 100644
--- a/tests/components/devolo_home_network/test_config_flow.py
+++ b/tests/components/devolo_home_network/test_config_flow.py
@@ -99,7 +99,7 @@ async def test_zeroconf(hass: HomeAssistant):
 
     assert (
         context["title_placeholders"][CONF_NAME]
-        == DISCOVERY_INFO["hostname"].split(".", maxsplit=1)[0]
+        == DISCOVERY_INFO.hostname.split(".", maxsplit=1)[0]
     )
 
     with patch(