diff --git a/wp-includes/rest-api.php b/wp-includes/rest-api.php
index a38d2ec460..336fe6b071 100644
--- a/wp-includes/rest-api.php
+++ b/wp-includes/rest-api.php
@@ -2365,7 +2365,7 @@ function rest_validate_array_value_from_schema( $value, $args, $param ) {
 
 	if ( isset( $args['maxItems'] ) && count( $value ) > $args['maxItems'] ) {
 		return new WP_Error(
-			'test_too_many_items',
+			'rest_too_many_items',
 			/* translators: 1: Parameter, 2: Number. */
 			sprintf(
 				_n(
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2542f48fca..a54996a20a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-RC1-50469';
+$wp_version = '5.7-RC1-50470';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.