diff --git a/tests/components/izone/conftest.py b/tests/components/izone/conftest.py
index 7f0bb092b407..61b6ac2637db 100644
--- a/tests/components/izone/conftest.py
+++ b/tests/components/izone/conftest.py
@@ -99,6 +99,7 @@ async def mock_discovery(
         mock_disco.return_value.controllers = {
             mock_controller.device_uid: mock_controller
         }
+        mock_disco.return_value.close = AsyncMock()
         yield mock_disco