diff --git a/wp-includes/default-constants.php b/wp-includes/default-constants.php
index c7a37cbfbe..77f76319b8 100644
--- a/wp-includes/default-constants.php
+++ b/wp-includes/default-constants.php
@@ -74,7 +74,11 @@ function wp_initial_constants() {
 
 	// Add define( 'WP_DEBUG', true ); to wp-config.php to enable display of notices during development.
 	if ( ! defined( 'WP_DEBUG' ) ) {
-		define( 'WP_DEBUG', false );
+		if ( 'development' === wp_get_environment_type() ) {
+			define( 'WP_DEBUG', true );
+		} else {
+			define( 'WP_DEBUG', false );
+		}
 	}
 
 	// Add define( 'WP_DEBUG_DISPLAY', null ); to wp-config.php to use the globally configured setting
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 16a03f7c73..99dc3bbc97 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48371';
+$wp_version = '5.5-alpha-48372';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.