diff --git a/ext/mysqli/tests/bug81335.phpt b/ext/mysqli/tests/bug81335.phpt
deleted file mode 100644
index 26f6bcd7e2d..00000000000
--- a/ext/mysqli/tests/bug81335.phpt
+++ /dev/null
@@ -1,34 +0,0 @@
---TEST--
-Bug #81335: Packets out of order after connection timeout
---EXTENSIONS--
-mysqli
---SKIPIF--
-<?php
-if (PHP_OS === 'WINNT') die('skip on windows');
-if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
-
-require_once 'connect.inc';
-if (!$link = @my_mysqli_connect($host, $user, $passwd, $db, $port, $socket)) die("skip cannot connect");
-if (mysqli_get_server_version($link) < 80024 || str_contains(mysqli_get_server_info($link), 'MariaDB')) {
-    die("skip: Due to many MySQL Server differences, the test requires >= 8.0.24");
-}
-?>
---FILE--
-<?php
-
-require_once 'connect.inc';
-mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
-$mysqli = new my_mysqli($host, $user, $passwd, $db, $port, $socket);
-$mysqli->query('SET WAIT_TIMEOUT=1');
-usleep(1000000 * 1.1);
-try {
-    $mysqli->query('SELECT 1 + 1');
-} catch(mysqli_sql_exception $e) {
-    echo $e->getMessage();
-    echo "\n";
-    echo $e->getCode();
-}
-?>
---EXPECTF--
-The client was disconnected by the server because of inactivity. See wait_timeout and interactive_timeout for configuring this behavior.
-4031
diff --git a/ext/mysqlnd/mysqlnd_enum_n_def.h b/ext/mysqlnd/mysqlnd_enum_n_def.h
index 56b28a28f53..27846f077a8 100644
--- a/ext/mysqlnd/mysqlnd_enum_n_def.h
+++ b/ext/mysqlnd/mysqlnd_enum_n_def.h
@@ -130,7 +130,6 @@
 #define CR_INVALID_PARAMETER_NO	2034
 #define CR_INVALID_BUFFER_USE	2035
 #define CR_LOAD_DATA_LOCAL_INFILE_REJECTED 2068
-#define CR_CLIENT_INTERACTION_TIMEOUT 4031
 
 #define MYSQLND_EE_FILENOTFOUND	 7890
 
diff --git a/ext/mysqlnd/mysqlnd_result.c b/ext/mysqlnd/mysqlnd_result.c
index cab0889cec9..08faed6d058 100644
--- a/ext/mysqlnd/mysqlnd_result.c
+++ b/ext/mysqlnd/mysqlnd_result.c
@@ -183,7 +183,7 @@ mysqlnd_query_read_result_set_header(MYSQLND_CONN_DATA * conn, MYSQLND_STMT * s)
 		UPSERT_STATUS_SET_AFFECTED_ROWS_TO_ERROR(conn->upsert_status);
 
 		if (FAIL == (ret = PACKET_READ(conn, &rset_header))) {
-			if (conn->error_info->error_no != CR_SERVER_GONE_ERROR && conn->error_info->error_no != CR_CLIENT_INTERACTION_TIMEOUT) {
+			if (conn->error_info->error_no != CR_SERVER_GONE_ERROR) {
 				php_error_docref(NULL, E_WARNING, "Error reading result set's header");
 			}
 			break;
diff --git a/ext/mysqlnd/mysqlnd_wireprotocol.c b/ext/mysqlnd/mysqlnd_wireprotocol.c
index 0c1cff286c9..908162c786f 100644
--- a/ext/mysqlnd/mysqlnd_wireprotocol.c
+++ b/ext/mysqlnd/mysqlnd_wireprotocol.c
@@ -267,19 +267,6 @@ mysqlnd_read_header(MYSQLND_PFC * pfc, MYSQLND_VIO * vio, MYSQLND_PACKET_HEADER
 		pfc->data->packet_no++;
 		DBG_RETURN(PASS);
 	}
-	// @see https://dev.mysql.com/worklog/task/?id=12999
-	if (header->size > 0) {
-		zend_uchar *buf = mnd_emalloc(header->size);
-		if ((PASS == pfc->data->m.receive(pfc, vio, buf, header->size, conn_stats, error_info)) && buf[0] == ERROR_MARKER) {
-			php_mysqlnd_read_error_from_line(buf + 1, header->size - 1,
-			                                 error_info->error, sizeof(error_info->error),
-			                                 &error_info->error_no, error_info->sqlstate
-			);
-			mnd_efree(buf);
-			DBG_RETURN(FAIL);
-		}
-		mnd_efree(buf);
-	}
 
 	DBG_ERR_FMT("Logical link: packets out of order. Expected %u received %u. Packet size=%zu",
 				pfc->data->packet_no, header->packet_no, header->size);
@@ -307,9 +294,7 @@ mysqlnd_read_packet_header_and_body(MYSQLND_PACKET_HEADER * packet_header,
 	DBG_INF_FMT("buf=%p size=%zu", buf, buf_size);
 	if (FAIL == mysqlnd_read_header(pfc, vio, packet_header, stats, error_info)) {
 		SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
-		if (error_info->error_no == 0) {
-			SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
-		}
+		SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
 		DBG_ERR_FMT("Can't read %s's header", packet_type_as_text);
 		DBG_RETURN(FAIL);
 	}