diff --git a/tests/components/voip/test_voip.py b/tests/components/voip/test_voip.py
index 65567c8e1d1..364c4d3dd5a 100644
--- a/tests/components/voip/test_voip.py
+++ b/tests/components/voip/test_voip.py
@@ -1119,9 +1119,10 @@ async def test_start_conversation_user_doesnt_pick_up(
         & assist_satellite.AssistSatelliteEntityFeature.START_CONVERSATION
     )
 
-    # Protocol has already been mocked, but "outgoing_call" is not async
+    # Protocol has already been mocked, but "outgoing_call" and "cancel_call" are not async
     mock_protocol: AsyncMock = hass.data[DOMAIN].protocol
     mock_protocol.outgoing_call = Mock()
+    mock_protocol.cancel_call = Mock()
 
     announcement = assist_satellite.AssistSatelliteAnnouncement(
         message="test announcement",