Fix flux_led tests opening sockets (home-assistant#156458)

Author: emontnemery

tests/components/flux_led/test_init.py

@@ -238,8 +238,10 @@ async def test_time_sync_startup_and_next_day(hass: HomeAssistant) -> None:
         assert config_entry.state is ConfigEntryState.LOADED
 
     assert len(bulb.async_set_time.mock_calls) == 1
-    async_fire_time_changed(hass, utcnow() + timedelta(hours=24))
-    await hass.async_block_till_done()
+
+    with _patch_discovery(), _patch_wifibulb(device=bulb):
+        async_fire_time_changed(hass, utcnow() + timedelta(hours=24))
+        await hass.async_block_till_done()
     assert len(bulb.async_set_time.mock_calls) == 2