diff --git a/examples/openthread/ot_ci_function.py b/examples/openthread/ot_ci_function.py
index ddcdfa28c4..c84b96593e 100644
--- a/examples/openthread/ot_ci_function.py
+++ b/examples/openthread/ot_ci_function.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
 # !/usr/bin/env python3
 # this file defines some functions for testing cli and br under pytest framework
@@ -408,20 +408,21 @@ def get_host_ipv4_address() -> str:
     return host_ipv4_address
 
 
-def start_avahi() -> None:
-    time.sleep(1)
-    command = '/etc/init.d/dbus start'
+def restart_avahi() -> None:
+    command = 'avahi-daemon -k'
     subprocess.Popen(command, shell=True)
-    time.sleep(5)
+    time.sleep(2)
     command = 'avahi-daemon'
     subprocess.Popen(command, shell=True)
     time.sleep(5)
 
 
-def host_publish_service() -> None:
-    command = 'avahi-publish-service testxxx _testxxx._udp 12347 test=1235 dn="for_ci_br_test"'
+def start_avahi() -> None:
+    time.sleep(1)
+    command = '/etc/init.d/dbus start'
     subprocess.Popen(command, shell=True)
-    time.sleep(2)
+    time.sleep(5)
+    restart_avahi()
 
 
 def host_close_service() -> None:
diff --git a/examples/openthread/pytest_otbr.py b/examples/openthread/pytest_otbr.py
index bfa04f4231..846247e2ad 100644
--- a/examples/openthread/pytest_otbr.py
+++ b/examples/openthread/pytest_otbr.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
 # !/usr/bin/env python3
 import copy
@@ -447,7 +447,10 @@ def test_service_discovery_of_WiFi_device(Init_interface:bool, Init_avahi:bool,
         command = 'dns browse _testxxx._udp.default.service.arpa'
         tmp = ocf.get_ouput_string(cli, command, 5)
         assert 'Port:12347' not in str(tmp)
-        ocf.host_publish_service()
+        ocf.restart_avahi()
+        command = 'avahi-publish-service testxxx _testxxx._udp 12347 test=1235 dn="for_ci_br_test"'
+        sp = subprocess.Popen(command, shell=True)
+        time.sleep(2)
         ocf.wait(cli, 5)
 
         command = 'dns browse _testxxx._udp.default.service.arpa'
@@ -455,14 +458,13 @@ def test_service_discovery_of_WiFi_device(Init_interface:bool, Init_avahi:bool,
         assert 'response for _testxxx' in str(tmp)
         assert 'Port:12347' in str(tmp)
 
-        command = 'dns browse _testxxx._udp.default.service.arpa'
+        command = 'dns service testxxx _testxxx._udp.default.service.arpa.'
         tmp = ocf.get_ouput_string(cli, command, 5)
-        ocf.execute_command(cli, 'dns service testxxx _testxxx._udp.default.service.arpa.')
-        tmp = cli.expect(pexpect.TIMEOUT, timeout=5)
         assert 'response for testxxx' in str(tmp)
         assert 'Port:12347' in str(tmp)
     finally:
         ocf.host_close_service()
+        sp.terminate()
         ocf.execute_command(br, 'factoryreset')
         ocf.execute_command(cli, 'factoryreset')
         time.sleep(3)