Insert HTML tag into Flask WTForms field

I am using Flask with Jinja2 / WTForms to create a login page and I want to customize the Remember Me checkbox. For this, I would like to add an empty tag <span>

to the form label field. Here is the Jinja2 code in the HTML file:

{{ login_user_form.remember|safe }} {{ login_user_form.remember.label }}

      

        
        
        
      

    

which generates the following HTML:

<input id="remember" name="remember" type="checkbox" value="y"> <label for="remember">Remember Me</label>

      

        
        
        
      

    

However, the following HTML is what I'll eventually like - notice the tag <span>

embedded within the label.

<input id="remember" name="remember" type="checkbox" value="y"> <label for="remember"><span></span>Remember Me</label>