diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0c3c5eea88..334e812231 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51581';
+$wp_version = '5.9-alpha-51582';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 0d867868b8..04fa15c1ee 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -1627,6 +1627,13 @@ class wpdb {
 		$client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0;
 
 		if ( $this->use_mysqli ) {
+			/*
+			 * Set the MySQLi error reporting off because WordPress handles its own.
+			 * This is due to the default value change from `MYSQLI_REPORT_OFF`
+			 * to `MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT` in PHP 8.1.
+			 */
+			mysqli_report( MYSQLI_REPORT_OFF );
+
 			$this->dbh = mysqli_init();
 
 			$host    = $this->dbhost;