Prevent runtime issue during entity registration in coordinator of AVM Fritz!Tools (#108667)

prevent dictionary changed size during iteration

homeassistant/components/fritz/common.py

@@ -315,12 +315,14 @@ class FritzBoxTools(
         }
         try:
             await self.async_scan_devices()
-            for key, update_fn in self._entity_update_functions.items():
+            for key in list(self._entity_update_functions):
                 _LOGGER.debug("update entity %s", key)
                 entity_data["entity_states"][
                     key
                 ] = await self.hass.async_add_executor_job(
-                    update_fn, self.fritz_status, self.data["entity_states"].get(key)
+                    self._entity_update_functions[key],
+                    self.fritz_status,
+                    self.data["entity_states"].get(key),
                 )
             if self.has_call_deflections:
                 entity_data[

tests/components/fritz/test_update.py

@@ -2,8 +2,6 @@
 
 from unittest.mock import patch
 
-import pytest
-
 from homeassistant.components.fritz.const import DOMAIN
 from homeassistant.components.update import DOMAIN as UPDATE_DOMAIN
 from homeassistant.config_entries import ConfigEntryState
@@ -49,7 +47,6 @@ async def test_update_entities_initialized(
     assert len(updates) == 1
 
 
-@pytest.mark.xfail(reason="Flaky test")
 async def test_update_available(
     hass: HomeAssistant,
     hass_client: ClientSessionGenerator,