How to Change the Testimonials Slug

Step #1

Add the following function to your theme’s functions.php file. Change the return value in the first function to whatever you want your page to be:

function change_testimonial_rotator_testimonial_slug( $name ) 
  return "praise"; 
add_filter( 'testimonial_rotator_testimonial_slug', 'change_testimonial_rotator_testimonial_slug' );

Step #2

After you add this bit of code, you will need to go into ‘Settings’ -> ‘Permalinks’ and just resave that page. It will flush your url links and create new ones.