diff --git a/tests/components/surepetcare/conftest.py b/tests/components/surepetcare/conftest.py
index 9ae1bfe310a..5dcc5dfdadc 100644
--- a/tests/components/surepetcare/conftest.py
+++ b/tests/components/surepetcare/conftest.py
@@ -17,6 +17,7 @@ from tests.common import MockConfigEntry
 async def _mock_call(method, resource):
     if method == "GET" and resource == MESTART_RESOURCE:
         return {"data": MOCK_API_DATA}
+    return None
 
 
 @pytest.fixture