def METHOD_NAME(self):
    """
    Config already has existing other option.
    """
    config = {"ckan.my_option": "This is my option"}
    toolkit.add_ckan_admin_tab(config, "my_route_name", "my_label")
    toolkit.add_ckan_admin_tab(
        config, "my_other_route_name", "my_other_label"
    )
    expected_dict = {
        "ckan.my_option": "This is my option",
        "ckan.admin_tabs": {
            "my_other_route_name": {
                "label": "my_other_label",
                "icon": None,
            },
            "my_route_name": {"label": "my_label", "icon": None},
        },
    }
    assert expected_dict == config