diff --git a/wp-admin/load-styles.php b/wp-admin/load-styles.php
index c758641ad6f0..18594fde6897 100644
--- a/wp-admin/load-styles.php
+++ b/wp-admin/load-styles.php
@@ -13,8 +13,11 @@
 }
 
 define( 'WPINC', 'wp-includes' );
+define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
 
 require ABSPATH . 'wp-admin/includes/noop.php';
+require ABSPATH . WPINC . '/theme.php';
+require ABSPATH . WPINC . '/class-wp-theme-json-resolver.php';
 require ABSPATH . WPINC . '/script-loader.php';
 require ABSPATH . WPINC . '/version.php';
 
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 349fde5c3b36..8eaa817d3ac8 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -34,14 +34,6 @@
 /** WordPress Styles Functions */
 require ABSPATH . WPINC . '/functions.wp-styles.php';
 
-// get_stylesheet_directory() is used by WP_Theme_JSON_Resolver::theme_has_support().
-if ( ! function_exists( 'get_stylesheet_directory' ) ) {
-	require_once ABSPATH . WPINC . '/theme.php';
-}
-if ( ! class_exists( 'WP_Theme_JSON_Resolver' ) ) {
-	require_once ABSPATH . WPINC . '/class-wp-theme-json-resolver.php';
-}
-
 /**
  * Registers TinyMCE scripts.
  *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 05193eb14663..f80aeb865f35 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-51055';
+$wp_version = '5.8-alpha-51056';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-settings.php b/wp-settings.php
index 75fa9e5881f0..99e77f386880 100644
--- a/wp-settings.php
+++ b/wp-settings.php
@@ -171,6 +171,7 @@
 require ABSPATH . WPINC . '/theme.php';
 require ABSPATH . WPINC . '/class-wp-theme.php';
 require ABSPATH . WPINC . '/class-wp-theme-json.php';
+require ABSPATH . WPINC . '/class-wp-theme-json-resolver.php';
 require ABSPATH . WPINC . '/class-wp-block-template.php';
 require ABSPATH . WPINC . '/block-template-utils.php';
 require ABSPATH . WPINC . '/block-template.php';