I have post type testimonials.

I am listing that testimonials by specific taxonomy with read more link.

When user click on read more link which is `get_permalink( $post )`, and redirect to specific page then i want to show previous and next post link with same taxonomy of current post?

If you require any more info then let me know.

I have added true as third element for it, but don't worked

```
previous_post_link( '%link', '<span class="meta-nav">' . _x( '&larr;', 'Previous post link', 'twentytwelve' ) . '</span> %title' ,true );

```