Index: src/wp-admin/includes/class-wp-site-health.php
===================================================================
--- src/wp-admin/includes/class-wp-site-health.php	(revision 45323)
+++ src/wp-admin/includes/class-wp-site-health.php	(working copy)
@@ -1577,7 +1577,7 @@
 		$blocked = false;
 		$hosts   = array();
 
-		if ( defined( 'WP_HTTP_BLOCK_EXTERNAL' ) ) {
+		if ( defined( 'WP_HTTP_BLOCK_EXTERNAL' ) && WP_HTTP_BLOCK_EXTERNAL ) {
 			$blocked = true;
 		}