diff --git a/homeassistant/components/hassio/websocket_api.py b/homeassistant/components/hassio/websocket_api.py
index c046e20feab..6714d5782e1 100644
--- a/homeassistant/components/hassio/websocket_api.py
+++ b/homeassistant/components/hassio/websocket_api.py
@@ -182,6 +182,6 @@ async def websocket_update_addon(
 async def websocket_update_core(
     hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
 ) -> None:
-    """Websocket handler to update an addon."""
+    """Websocket handler to update Home Assistant Core."""
     await update_core(hass, None, msg["backup"])
     connection.send_result(msg[WS_ID])
diff --git a/tests/components/hassio/test_websocket_api.py b/tests/components/hassio/test_websocket_api.py
index 6334fb096a2..497b961c80f 100644
--- a/tests/components/hassio/test_websocket_api.py
+++ b/tests/components/hassio/test_websocket_api.py
@@ -849,9 +849,7 @@ async def test_update_core_with_backup_and_error(
             side_effect=BackupManagerError,
         ),
     ):
-        await client.send_json_auto_id(
-            {"type": "hassio/update/addon", "addon": "test", "backup": True}
-        )
+        await client.send_json_auto_id({"type": "hassio/update/core", "backup": True})
         result = await client.receive_json()
     assert not result["success"]
     assert result["error"] == {