tests: Adjust assertion to work with python 3.12

tests/test_library.py

@@ -112,11 +112,11 @@ def test_to_ref(type):
 )
 def test_browse_routing(library, path, expected_handler, mocker, remaining):
     handler = mocker.patch.object(
-        library, expected_handler, return_value=("test", False)
+        library, expected_handler, return_value=("test", False), autospec=True
     )
 
     assert library.browse(path) == "test"
-    assert handler.called_once_with(remaining)
+    handler.assert_called_once_with(remaining)
 
 
 def test_browse_favorites_root(library):