Display post and custom post types categories in one loop

<?php
wp_reset_postdata();
  
    $args = array(
        'post_type' => array(
            'post',
            'unicorn'),
            'tax_query' => array(
                'relation' => 'OR',
                    array(
                        'taxonomy' => 'category',
                        'field' => 'slug',
                        'terms' => array( 'test' )
                    ),
                    array(
                        'taxonomy' => 'unicorn_category',
                        'field' => 'slug',
                        'terms' => array( 'blur' )
                    )
        ),
    );
     
 
  
$the_query = new WP_Query( $args ); ?>
  
<?php if ( $the_query->have_posts() ) : while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
 
    <h2><?php the_title(); ?></h2>
  
<?php endwhile; endif; ?>
  
<?php wp_reset_postdata(); ?>