<?php
    $amor = new WP_Query(array(
        'post_type' => 'testes',
        'tax_query' => array(
            array(
                'taxonomy' => 'categorias_testes',
                'field' => 'slug',
                'terms' => 'amor'
            )
        )
    ));
    $amizade = new WP_Query(array(
        'post_type' => 'testes',
        'tax_query' => array(
            array(
                'taxonomy' => 'categorias_testes',
                'field' => 'slug',
                'terms' => 'amizade'
            )
        )
    ));
?>
    AMOR
    <?php if ($amor->have_posts()) : while($amor->have_posts()) : $amor->the_post(); ?>
        <?php the_post_thumbnail('thumbnail'); ?>
        <a title="<?php the_title(); ?>" href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
    <?php endwhile; else :  ?>
        404
    <?php endif;  ?>

    AMIZADE
    <?php if ($amizade->have_posts()) : while($amizade->have_posts()) : $amizade->the_post(); ?>
            <?php the_post_thumbnail('thumbnail'); ?>
        <a title="<?php the_title(); ?>" href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
    <?php endwhile; else :  ?>
        404
    <?php endif;  ?>