public function test_hierarchy_should_be_ignored_when_threading_is_disabled() {
    $now       = time();
    $p         = self::factory()->post->create();
    $comment_1 = self::factory()->comment->create(
      array(
        'comment_post_ID'  => $p,
        'comment_content'  => '1',
        'comment_approved' => '1',
        'comment_date_gmt' => gmdate( 'Y-m-d H:i:s', $now - 100 ),
      )
    );
    $comment_2 = self::factory()->comment->create(
      array(
        'comment_post_ID'  => $p,
        'comment_content'  => '2',
        'comment_approved' => '1',
        'comment_date_gmt' => gmdate( 'Y-m-d H:i:s', $now - 300 ),
      )
    );
    $comment_3 = self::factory()->comment->create(
      array(
        'comment_post_ID'  => $p,
        'comment_content'  => '3',
        'comment_approved' => '1',
        'comment_parent'   => $comment_1,
        'comment_date_gmt' => gmdate( 'Y-m-d H:i:s', $now - 200 ),
      )
    );

    update_option( 'comment_order', 'asc' );
    update_option( 'thread_comments', 0 );

    $this->go_to( get_permalink( $p ) );
    $found = get_echo( 'comments_template' );

    // Find the found comments in the markup.
    preg_match_all( '|id="comment-([0-9]+)|', $found, $matches );

    $found_cids = array_map( 'intval', $matches[1] );
    $this->assertSame( array( $comment_2, $comment_3, $comment_1 ), $found_cids );
  }