Block tests from opening sockets (#55516)

tests/components/frontend/test_init.py

@@ -79,6 +79,12 @@ async def frontend_themes(hass):
     )
 
 
+@pytest.fixture
+def aiohttp_client(loop, aiohttp_client, socket_enabled):
+    """Return aiohttp_client and allow opening sockets."""
+    return aiohttp_client
+
+
 @pytest.fixture
 async def mock_http_client(hass, aiohttp_client, frontend):
     """Start the Home Assistant HTTP component."""