Index: src/wp-includes/rest-api.php
===================================================================
--- src/wp-includes/rest-api.php	(revision 38192)
+++ src/wp-includes/rest-api.php	(working copy)
@@ -587,16 +587,16 @@
 		return true;
 	}
 
+	// Send a refreshed nonce in header.
+	$wp_rest_server->send_header( 'X-WP-Nonce', wp_create_nonce( 'wp_rest' ) );
+
 	// Check the nonce.
 	$result = wp_verify_nonce( $nonce, 'wp_rest' );
 
 	if ( ! $result ) {
-		return new WP_Error( 'rest_cookie_invalid_nonce', __( 'Cookie nonce is invalid' ), array( 'status' => 403 ) );
+		return new WP_Error( 'rest_cookie_expired_nonce', __( 'Cookie nonce expired' ), array( 'status' => 403 ) );
 	}
 
-	// Send a refreshed nonce in header.
-	$wp_rest_server->send_header( 'X-WP-Nonce', wp_create_nonce( 'wp_rest' ) );
-
 	return true;
 }