diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 6e525219b8..9487dc6cd4 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -141,7 +141,10 @@ class WP_Upgrader {
 	public function init() {
 		$this->skin->set_upgrader( $this );
 		$this->generic_strings();
-		$this->schedule_temp_backup_cleanup();
+
+		if ( ! wp_installing() ) {
+			$this->schedule_temp_backup_cleanup();
+		}
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 65bbc56161..c31290443c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-52283';
+$wp_version = '5.9-alpha-52284';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.