diff --git a/tests/components/sia/test_config_flow.py b/tests/components/sia/test_config_flow.py
index 9679f4949e8..a91822c7846 100644
--- a/tests/components/sia/test_config_flow.py
+++ b/tests/components/sia/test_config_flow.py
@@ -209,6 +209,13 @@ async def test_abort_form(hass):
     assert get_abort["reason"] == "already_configured"
 
 
+@pytest.fixture(autouse=True)
+def mock_sia():
+    """Mock SIAClient."""
+    with patch("homeassistant.components.sia.hub.SIAClient", autospec=True):
+        yield
+
+
 @pytest.mark.parametrize(
     "field, value, error",
     [