diff --git a/examples/openthread/ot_ci_function.py b/examples/openthread/ot_ci_function.py
index d4f76c6864b..96075a1adce 100644
--- a/examples/openthread/ot_ci_function.py
+++ b/examples/openthread/ot_ci_function.py
@@ -809,9 +809,25 @@ def execute_command(dut: IdfDut, command: str, prefix: str = 'ot ') -> None:
 
 def get_output_string(dut: IdfDut, command: str, wait_time: int) -> str:
     execute_command(dut, command)
-    tmp = dut.expect(pexpect.TIMEOUT, timeout=wait_time)
+    output = dut.expect(pexpect.TIMEOUT, timeout=wait_time)
     clean_buffer(dut)
-    return str(tmp)
+    if isinstance(output, bytes):
+        return output.decode('utf-8', errors='replace')
+    return str(output)
+
+
+def escape_ot_cli_arg(value: str) -> str:
+    return value.replace('\\', '\\\\').replace(' ', '\\ ')
+
+
+def parse_dns_browse_instance(browse_output: str, port: str = '12347') -> str:
+    normalized = re.sub(r'\r\n?', '\n', browse_output)
+    match = re.search(
+        r'DNS browse response for [^\n]+\n+([^\n]+)\n+\s+Port:' + re.escape(port),
+        normalized,
+    )
+    assert match, f'no service instance with Port:{port} in browse output: {browse_output}'
+    return match.group(1).strip()
 
 
 def wait_for_host_network(host: str = '8.8.8.8', retries: int = 6, interval: int = 10) -> None:
diff --git a/examples/openthread/pytest_otbr.py b/examples/openthread/pytest_otbr.py
index 83d2a9afdb6..4121f30acce 100644
--- a/examples/openthread/pytest_otbr.py
+++ b/examples/openthread/pytest_otbr.py
@@ -94,18 +94,28 @@ def fixture_Init_interface() -> bool:
     return True
 
 
-default_br_ot_para = ocf.thread_parameter('leader', '', '12', '7766554433221100', True)
-default_br_wifi_para = ocf.wifi_parameter('OTCITE', 'otcitest888', 10)
-default_cli_ot_para = ocf.thread_parameter('router', '', '', '', False)
-ESPPORT1 = os.getenv('ESPPORT1')
-ESPPORT2 = os.getenv('ESPPORT2')
-ESPPORT3 = os.getenv('ESPPORT3')
-
 PORT_MAPPING = {
     'ESPPORT1': 'esp32h2',
     'ESPPORT2': 'esp32s3',
-    'ESPPORT3': 'esp32c6'
+    'ESPPORT3': 'esp32c6',
 }
+ESPPORT1, ESPPORT2, ESPPORT3 = (os.getenv(name) for name in PORT_MAPPING)
+
+_RUNNER_CHANNEL = os.getenv('CHANNEL', '12')
+_RUNNER_NETWORKKEY = os.getenv('NETWORKKEY', '99112233445566778899aabbccddeeff')
+_BR_EXTADDR = '7766554433221100'
+
+
+def _leader_ot_para(bbr: bool = True) -> ocf.thread_parameter:
+    para = ocf.thread_parameter('leader', '', _RUNNER_CHANNEL, _BR_EXTADDR, bbr)
+    if _RUNNER_NETWORKKEY:
+        para.setnetworkkey(_RUNNER_NETWORKKEY)
+    return para
+
+
+default_br_ot_para = _leader_ot_para()
+default_br_wifi_para = ocf.wifi_parameter(os.getenv('RUNNER_AP_SSID'), os.getenv('RUNNER_AP_PASSWORD'), 10)
+default_cli_ot_para = ocf.thread_parameter('router', '', '', '', False)
 
 
 @pytest.fixture(scope='module', autouse=True)
@@ -129,7 +139,7 @@ def erase_flash_after_all_cases() -> Generator[None, None, None]:
 
 # Case 1: Thread network formation and attaching
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_connect
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -230,7 +240,7 @@ def formBasicWiFiThreadNetwork(br:IdfDut, cli:IdfDut) -> None:
 
 # Case 2: Bidirectional IPv6 connectivity
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_connect
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -427,7 +437,7 @@ def test_multicast_forwarding_B(Init_interface:bool, dut: Tuple[IdfDut, IdfDut,
 
 # Case 5: discover dervice published by Thread device
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_service
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -496,8 +506,8 @@ def test_service_discovery_of_Thread_device(Init_interface:bool, Init_avahi:bool
 
 # Case 6: discover dervice published by Wi-Fi device
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
-@pytest.mark.flaky(reruns=3, reruns_delay=5)
+@pytest.mark.openthread_br_service
+@pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
     [
@@ -566,10 +576,11 @@ def test_service_discovery_of_WiFi_device(Init_interface:bool, Init_avahi:bool,
         tmp = ocf.get_output_string(cli, command, 10)
         assert 'response for _testxxx' in str(tmp)
         assert 'Port:12347' in str(tmp)
+        instance_label = ocf.parse_dns_browse_instance(str(tmp))
 
-        command = 'dns service testxxx _testxxx._udp.default.service.arpa.'
+        command = 'dns service ' + ocf.escape_ot_cli_arg(instance_label) + ' _testxxx._udp.default.service.arpa.'
         tmp = ocf.get_output_string(cli, command, 10)
-        assert 'response for testxxx' in str(tmp)
+        assert f'response for {instance_label}' in str(tmp)
         assert 'Port:12347' in str(tmp)
     finally:
         ocf.host_close_service()
@@ -582,7 +593,7 @@ def test_service_discovery_of_WiFi_device(Init_interface:bool, Init_avahi:bool,
 
 # Case 7: ICMP communication via NAT64
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_nat64
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -620,7 +631,7 @@ def test_ICMP_NAT64(Init_interface:bool, dut: Tuple[IdfDut, IdfDut, IdfDut]) ->
 
 # Case 8: UDP communication via NAT64
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_nat64
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -676,7 +687,7 @@ def test_UDP_NAT64(Init_interface:bool, dut: Tuple[IdfDut, IdfDut, IdfDut]) -> N
 
 # Case 9: TCP communication via NAT64
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_nat64
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -773,7 +784,7 @@ def test_ot_sleepy_device(dut: Tuple[IdfDut, IdfDut]) -> None:
     try:
         ocf.init_thread(leader)
         time.sleep(3)
-        leader_para = ocf.thread_parameter('leader', '', '12', '7766554433221100', False)
+        leader_para = _leader_ot_para(bbr=False)
         ocf.SetThreadNetworkPara(leader, leader_para)
         ocf.StartThreadNetwork(leader, leader_para)
         ocf.wait(leader, 5)
@@ -847,7 +858,7 @@ def test_basic_startup(dut: Tuple[IdfDut, IdfDut]) -> None:
 
 # Case 13: Meshcop discovery of Border Router
 @pytest.mark.supported_targets
-@pytest.mark.openthread_br
+@pytest.mark.openthread_br_service
 @pytest.mark.flaky(reruns=1, reruns_delay=5)
 @pytest.mark.parametrize(
     'config, count, app_path, target, port',
@@ -1035,7 +1046,7 @@ def test_ot_ssed_device(dut: Tuple[IdfDut, IdfDut]) -> None:
         ssed_device.expect('32k XTAL in use', timeout=10)
         ocf.init_thread(leader)
         time.sleep(3)
-        leader_para = ocf.thread_parameter('leader', '', '12', '7766554433221100', False)
+        leader_para = _leader_ot_para(bbr=False)
         ocf.SetThreadNetworkPara(leader, leader_para)
         ocf.StartThreadNetwork(leader, leader_para)
         ocf.wait(leader, 5)
@@ -1047,7 +1058,7 @@ def test_ot_ssed_device(dut: Tuple[IdfDut, IdfDut]) -> None:
         ssed_device.expect('Done', timeout=5)
         ocf.execute_command(ssed_device, 'csl period 3000000')
         ssed_device.expect('Done', timeout=5)
-        ocf.execute_command(ssed_device, 'csl channel 12')
+        ocf.execute_command(ssed_device, f'csl channel {_RUNNER_CHANNEL}')
         ssed_device.expect('Done', timeout=5)
         ocf.execute_command(ssed_device, 'ifconfig up')
         ssed_device.expect('Done', timeout=5)
diff --git a/tools/ci/idf_pytest/constants.py b/tools/ci/idf_pytest/constants.py
index e6f01a03a33..6540a4e4a18 100644
--- a/tools/ci/idf_pytest/constants.py
+++ b/tools/ci/idf_pytest/constants.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2023-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2023-2026 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0
 """
 Pytest Related Constants. Don't import third-party packages here.
@@ -97,8 +97,11 @@ ENV_MARKERS = {
     'httpbin': 'runner for tests that need to access the httpbin service',
     # multi-dut markers
     'ieee802154': 'ieee802154 related tests should run on ieee802154 runners.',
-    'openthread_br': 'tests should be used for openthread border router.',
-    'openthread_bbr': 'tests should be used for openthread border router linked to Internet.',
+    'openthread_br': 'openthread BR basic and multicast cases.',
+    'openthread_br_connect': 'openthread BR attach and connectivity cases.',
+    'openthread_br_service': 'openthread BR service discovery cases.',
+    'openthread_br_nat64': 'openthread BR NAT64 cases without internet.',
+    'openthread_bbr': 'openthread BR cases with internet access.',
     'openthread_sleep': 'tests should be used for openthread sleepy device.',
     'zigbee_multi_dut': 'zigbee runner which have multiple duts.',
     'two_duts': 'tests should be run on runners which has two wifi duts connected.',