Use fixtures in deCONZ diagnostics tests (#120968)

tests/components/deconz/test_diagnostics.py

@@ -3,29 +3,25 @@
 from pydeconz.websocket import State
 from syrupy import SnapshotAssertion
 
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant
 
-from .test_gateway import setup_deconz_integration
-
 from tests.components.diagnostics import get_diagnostics_for_config_entry
-from tests.test_util.aiohttp import AiohttpClientMocker
 from tests.typing import ClientSessionGenerator
 
 
 async def test_entry_diagnostics(
     hass: HomeAssistant,
     hass_client: ClientSessionGenerator,
-    aioclient_mock: AiohttpClientMocker,
+    config_entry_setup: ConfigEntry,
     mock_deconz_websocket,
     snapshot: SnapshotAssertion,
 ) -> None:
     """Test config entry diagnostics."""
-    config_entry = await setup_deconz_integration(hass, aioclient_mock)
-
     await mock_deconz_websocket(state=State.RUNNING)
     await hass.async_block_till_done()
 
     assert (
-        await get_diagnostics_for_config_entry(hass, hass_client, config_entry)
+        await get_diagnostics_for_config_entry(hass, hass_client, config_entry_setup)
         == snapshot
     )