TypeError: Failed to execute 'appendChild' on 'Node': parameter 1 is not of type 'Node' in JEST

Hi I am new to Jest and I have a test as follows

test('Description', () => {
    document.body.innerHTML = '<div id=\'holder\'></div>';
    const dynamicData = {
        dialogTitle: 'Testing innderDialog.show() method',
        bodyContent: '<div>sample text</div>'
    };
    const onCloseMock = jest.fn();
    const holder = document.querySelector('#holder');
    console.log(holder.appendChild);
    mymodule.show(dynamicData, document.querySelector('#holder'), onCloseMock, [], window);
});

mymodule's show method is as follows

show (dynamicData, holder, onClose, onCloseArg, onCloseCtx) {
    holder.appendChild(/*generatedHTML*/);
}

This appendChild is throwing error. But when I try the samething in Jest test file it is working.

What am I doing wrong here? Am I missing something?