diff --git a/tests/scripts/thread-cert/Cert_8_1_01_Commissioning.py b/tests/scripts/thread-cert/Cert_8_1_01_Commissioning.py
index 8a7fd8a6f..a494a8676 100755
--- a/tests/scripts/thread-cert/Cert_8_1_01_Commissioning.py
+++ b/tests/scripts/thread-cert/Cert_8_1_01_Commissioning.py
@@ -30,9 +30,14 @@
 import time
 import unittest
 
+import command
 import config
+import dtls
+import mle
 import node
 
+from command import CheckType
+
 COMMISSIONER = 1
 JOINER = 2
 
@@ -46,10 +51,10 @@ class Cert_8_1_01_Commissioning(unittest.TestCase):
 
         self.nodes[COMMISSIONER].set_panid(0xface)
         self.nodes[COMMISSIONER].set_mode('rsdn')
-        self.nodes[COMMISSIONER].set_masterkey('deadbeefdeadbeefdeadbeefdeadbeef')
+        self.nodes[COMMISSIONER].set_masterkey('00112233445566778899aabbccddeeff')
 
         self.nodes[JOINER].set_mode('rsdn')
-        self.nodes[JOINER].set_masterkey('00112233445566778899aabbccddeeff')
+        self.nodes[JOINER].set_masterkey('deadbeefdeadbeefdeadbeefdeadbeef')
         self.nodes[JOINER].set_router_selection_jitter(1)
 
     def tearDown(self):
@@ -70,11 +75,67 @@ class Cert_8_1_01_Commissioning(unittest.TestCase):
         self.nodes[JOINER].interface_up()
         self.nodes[JOINER].joiner_start('OPENTHREAD')
         self.simulator.go(10)
+        self.simulator.read_cert_messages_in_commissioning_log([COMMISSIONER,JOINER])
         self.assertEqual(self.nodes[JOINER].get_masterkey(), self.nodes[COMMISSIONER].get_masterkey())
 
+        joiner_messages = self.simulator.get_messages_sent_by(JOINER)
+        commissioner_messages = self.simulator.get_messages_sent_by(COMMISSIONER)
+
+        # 2 - N/A
+
+        # 3 - Joiner_1
+        msg = joiner_messages.next_mle_message(mle.CommandType.DISCOVERY_REQUEST)
+        command.check_discovery_request(msg)
+        request_src_addr = msg.mac_header.src_address
+
+        # 4 - Commissioner
+        msg = commissioner_messages.next_mle_message(mle.CommandType.DISCOVERY_RESPONSE)
+        command.check_discovery_response(msg, request_src_addr, steering_data=CheckType.CONTAIN)
+        udp_port_set_by_commissioner = command.get_joiner_udp_port_in_discovery_response(msg)
+
+        # 5.2 - Joiner_1
+        msg = joiner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.CLIENT_HELLO)
+        self.assertEqual(msg.get_dst_udp_port(), udp_port_set_by_commissioner)
+
+        # 5.3 - Commissioner
+        msg = commissioner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.HELLO_VERIFY_REQUEST)
+        commissioner_cookie = msg.dtls.body.cookie
+
+        # 5.4 - Joiner_1
+        msg = joiner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.CLIENT_HELLO)
+        self.assertEqual(commissioner_cookie, msg.dtls.body.cookie)
+        self.assertEqual(msg.get_dst_udp_port(), udp_port_set_by_commissioner)
+
+        # 5.5 - Commissioner
+        commissioner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.SERVER_HELLO)
+        commissioner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.SERVER_KEY_EXCHANGE)
+        commissioner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.SERVER_HELLO_DONE)
+
+        # 5.6 - Joiner_1
+        msg = joiner_messages.next_dtls_message(dtls.ContentType.HANDSHAKE, dtls.HandshakeType.CLIENT_KEY_EXCHANGE)
+        self.assertEqual(msg.get_dst_udp_port(), udp_port_set_by_commissioner)
+        msg = joiner_messages.next_dtls_message(dtls.ContentType.CHANGE_CIPHER_SPEC)
+        self.assertEqual(msg.get_dst_udp_port(), udp_port_set_by_commissioner)
+
+        # TODO(wgtdkp): It's required to verify DTLS FINISHED message here. Currently not handled as it is encrypted.
+
+        # 5.7 - Commissioner
+        commissioner_messages.next_dtls_message(dtls.ContentType.CHANGE_CIPHER_SPEC)
+
+        # TODO(wgtdkp): It's required to verify DTLS FINISHED message here. Currently not handled as it is encrypted.
+
+        # 5.8,9,10,11
+        # - Joiner_1
+        command.check_joiner_commissioning_messages(joiner_messages.commissioning_messages)
+        # - Commissioner
+        command.check_commissioner_commissioning_messages(commissioner_messages.commissioning_messages)
+        # As commissioner is also joiner router
+        command.check_joiner_router_commissioning_messages(commissioner_messages.commissioning_messages)
+
         self.nodes[JOINER].thread_start()
         self.simulator.go(5)
         self.assertEqual(self.nodes[JOINER].get_state(), 'router')
 
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/tests/scripts/thread-cert/mesh_cop.py b/tests/scripts/thread-cert/mesh_cop.py
index 7a9e21f8a..2485b10b1 100644
--- a/tests/scripts/thread-cert/mesh_cop.py
+++ b/tests/scripts/thread-cert/mesh_cop.py
@@ -226,7 +226,6 @@ class VendorData(object):
 
     def __init__(self, data):
         self._vendor_data = data
-
     @property
     def vendor_data(self):
         return self._vendor_data