writing html with functions

This words to set the html but when it happens it not only writes the h1 element but it also writes the whole function, how can I make it so it only writes whats inside of the two `

function tokens() {
        return `
        <h1>test</h1>
    `;
}

document.getElementById('tokens').innerHTML = tokens;

>Solution :

Change

document.getElementById('tokens').innerHTML = tokens;

by this

document.getElementById('tokens').innerHTML = tokens();