Mock out I/O in the default_config test (#37897)

This test never passed locally because of the I/O.

tests/components/default_config/test_init.py

@@ -6,6 +6,27 @@ from homeassistant.setup import async_setup_component
 from tests.async_mock import patch
 
 
+@pytest.fixture(autouse=True)
+def mock_zeroconf():
+    """Mock zeroconf."""
+    with patch("homeassistant.components.zeroconf.HaZeroconf"):
+        yield
+
+
+@pytest.fixture(autouse=True)
+def mock_ssdp():
+    """Mock ssdp."""
+    with patch("homeassistant.components.ssdp.Scanner.async_scan"):
+        yield
+
+
+@pytest.fixture(autouse=True)
+def mock_updater():
+    """Mock updater."""
+    with patch("homeassistant.components.updater.get_newest_version"):
+        yield
+
+
 @pytest.fixture(autouse=True)
 def recorder_url_mock():
     """Mock recorder url."""