diff --git a/libknet/tests/api_knet_handle_pmtud_set.c b/libknet/tests/api_knet_handle_pmtud_set.c
index ef9d3577..6fb8b206 100644
--- a/libknet/tests/api_knet_handle_pmtud_set.c
+++ b/libknet/tests/api_knet_handle_pmtud_set.c
@@ -1,120 +1,120 @@
 /*
  * Copyright (C) 2016-2025 Red Hat, Inc.  All rights reserved.
  *
  * Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
  *
  * This software licensed under GPL-2.0+
  */
 
 #include "config.h"
 
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "libknet.h"
 
 #include "internals.h"
 #include "test-common.h"
 
 static int private_data;
 
 static void sock_notify(void *pvt_data,
 			int datafd,
 			int8_t channel,
 			uint8_t tx_rx,
 			int error,
 			int errorno)
 {
 	return;
 }
 
 static void test(void)
 {
 	knet_handle_t knet_h1, knet_h[2];
 	int res;
 	int logfds[2];
 	unsigned int iface_mtu = 0, data_mtu;
 	int datafd = 0;
 	int8_t channel = 0;
 	struct sockaddr_storage lo;
 
 	printf("Test knet_handle_pmtud_set incorrect knet_h\n");
 
 	if ((!knet_handle_pmtud_set(NULL, iface_mtu)) || (errno != EINVAL)) {
 		printf("knet_handle_pmtud_set accepted invalid knet_h or returned incorrect error: %s\n", strerror(errno));
 		exit(FAIL);
 	}
 
 	setup_logpipes(logfds);
 
 	knet_h1 = knet_handle_start(logfds, KNET_LOG_DEBUG, knet_h);
 
 	flush_logs(logfds[0], stdout);
 
 	iface_mtu = KNET_PMTUD_SIZE_V4 + 1;
 
 	printf("Test knet_handle_pmtud_set with wrong iface_mtu\n");
 	FAIL_ON_SUCCESS(knet_handle_pmtud_set(knet_h1, iface_mtu), EINVAL);
 	FAIL_ON_ERR(knet_handle_enable_sock_notify(knet_h1, &private_data, sock_notify));
 
 	datafd = 0;
 	channel = -1;
 
 	FAIL_ON_ERR(knet_handle_add_datafd(knet_h1, &datafd, &channel, 0));
 
 	FAIL_ON_ERR(knet_host_add(knet_h1, 1));
 
 	FAIL_ON_ERR(_knet_link_set_config(knet_h1, 1, 0, KNET_TRANSPORT_UDP, 0, AF_INET, 0, &lo));
 
 	FAIL_ON_ERR(knet_link_set_pong_count(knet_h1, 1, 0, 1));
 
 	FAIL_ON_ERR(knet_link_set_enable(knet_h1, 1, 0, 1));
 
 	FAIL_ON_ERR(wait_for_host(knet_h1, 1, 4, logfds[0], stdout));
 
 	FAIL_ON_ERR(knet_handle_pmtud_get(knet_h1, &data_mtu));
 
 	/*
 	 * 28 = IP (20) + UDP (8)
 	 */
 	iface_mtu = data_mtu + 28 + KNET_HEADER_ALL_SIZE - 64;
 	printf("Test knet_handle_pmtud_set with iface_mtu %u\n", iface_mtu);
 
 	FAIL_ON_ERR(knet_handle_pmtud_set(knet_h1, iface_mtu));
 
 	/*
 	 * wait for PMTUd to pick up the change
 	 */
 	test_sleep(knet_h1, 1);
 	flush_logs(logfds[0], stdout);
 
 	if (knet_h1->data_mtu != data_mtu - 64) {
 		printf("knet_handle_pmtud_set failed to set the value\n");
 		CLEAN_EXIT(FAIL);
 	}
 
 	printf("Test knet_handle_pmtud_set with iface_mtu 0\n");
 	FAIL_ON_ERR(knet_handle_pmtud_set(knet_h1, 0));
 
 	/*
 	 * wait for PMTUd to pick up the change
 	 */
-	test_sleep(knet_h1, 1);
+	test_sleep(knet_h1, 5);
 	flush_logs(logfds[0], stdout);
 
 	if (knet_h1->data_mtu != data_mtu) {
 		printf("knet_handle_pmtud_set failed to redetect MTU: detected mtu: %u data_mtu: %u \n", knet_h1->data_mtu, data_mtu);
 		CLEAN_EXIT(FAIL);
 	}
 	CLEAN_EXIT(CONTINUE);
 }
 
 int main(int argc, char *argv[])
 {
 	test();
 
 	return PASS;
 }