Test error logging in WordPress

<?php
define( 'WP_USE_THEMES', false );
require( dirname( __FILE__ ) . '/wp-blog-header.php' );

$log_file = trailingslashit( WP_CONTENT_DIR ) . 'test.log';
echo $log_file;
if ( defined( 'WP_DEBUG' ) && true === WP_DEBUG ) {
    error_log( "WP_DEBUG enabled\n", 3, $log_file );
} else {
    error_log( "WP_DEBUG disabled\n", 3, $log_file );
}