testimonials cpt loop

// WP_Query arguments
$args = array(
	'post_type'              => array( 'testimonials' ),
	'orderby'                => 'rand',
);

// The Query
$loop_testimonials = new WP_Query( $args );

// The Loop
if ( $loop_testimonials->have_posts() ) {
	while ( $loop_testimonials->have_posts() ) {
		$loop_testimonials->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();