diff --git a/wp-includes/https-detection.php b/wp-includes/https-detection.php
index 2ced175047..7642fda3da 100644
--- a/wp-includes/https-detection.php
+++ b/wp-includes/https-detection.php
@@ -204,7 +204,7 @@ function wp_cron_conditionally_prevent_sslverify( $request ) {
 function wp_is_local_html_output( $html ) {
 	// 1. Check if HTML includes the site's Really Simple Discovery link.
 	if ( has_action( 'wp_head', 'rsd_link' ) ) {
-		$pattern = esc_url( site_url( 'xmlrpc.php?rsd', 'rpc' ) ); // See rsd_link().
+		$pattern = preg_replace( '#^https?:(?=//)#', '', esc_url( site_url( 'xmlrpc.php?rsd', 'rpc' ) ) ); // See rsd_link().
 		return false !== strpos( $html, $pattern );
 	}
 
@@ -218,7 +218,7 @@ function wp_is_local_html_output( $html ) {
 	// 3. Check if HTML includes the site's REST API link.
 	if ( has_action( 'wp_head', 'rest_output_link_wp_head' ) ) {
 		// Try both HTTPS and HTTP since the URL depends on context.
-		$pattern = esc_url( preg_replace( '#^https?:(?=//)#', '', get_rest_url() ) ); // See rest_output_link_wp_head().
+		$pattern = preg_replace( '#^https?:(?=//)#', '', esc_url( get_rest_url() ) ); // See rest_output_link_wp_head().
 		return false !== strpos( $html, $pattern );
 	}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5ec3d254cc..4a02ae5c39 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-beta3-50390';
+$wp_version = '5.7-beta3-50391';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.