If I use the following parse command: ``` const htmlDoc = parse('<div><linkHtml href="https://nowhere.com">testing</linkHtml></div>', { lowerCaseTagName: false }); ``` And then I use the following to get the HTML string back out: const html = htmlDoc.toString(); the HTML string looks like the following: <div><linkhtml href="https://nowhere.com">testing</linkhtml></div> toString should either respect the option in the parse method, or a boolean parameter should be added to the toString() method. e.g. const html = htmlDoc.toString(false);