[tests] replace get_addr_rloc() by get_rloc() (#4380)
diff --git a/tests/scripts/thread-cert/Cert_9_2_02_MGMTCommissionerSet.py b/tests/scripts/thread-cert/Cert_9_2_02_MGMTCommissionerSet.py
index 942c393..1ab4750 100755
--- a/tests/scripts/thread-cert/Cert_9_2_02_MGMTCommissionerSet.py
+++ b/tests/scripts/thread-cert/Cert_9_2_02_MGMTCommissionerSet.py
@@ -119,7 +119,7 @@
             COMMISSIONER
         )
         msg = commissioner_messages.next_coap_message('0.02', uri_path='/c/cs')
-        rloc = ip_address(self.nodes[LEADER].get_addr_rloc())
+        rloc = ip_address(self.nodes[LEADER].get_rloc())
         leader_aloc = ip_address(self.nodes[LEADER].get_addr_leader_aloc())
         command.check_coap_message(
             msg,
@@ -220,7 +220,7 @@
         )
 
         # Step 15 - Send ICMPv6 Echo Request to Leader
-        leader_rloc = self.nodes[LEADER].get_addr_rloc()
+        leader_rloc = self.nodes[LEADER].get_rloc()
         self.assertTrue(self.nodes[COMMISSIONER].ping(leader_rloc))
 
 
diff --git a/tests/scripts/thread-cert/node.py b/tests/scripts/thread-cert/node.py
index 65c46c2..70110ba 100755
--- a/tests/scripts/thread-cert/node.py
+++ b/tests/scripts/thread-cert/node.py
@@ -576,19 +576,6 @@
 
         return None
 
-    def get_addr_rloc(self):
-        addrs = self.get_addrs()
-        for addr in addrs:
-            segs = addr.split(':')
-            if (
-                segs[4] == '0'
-                and segs[5] == 'ff'
-                and segs[6] == 'fe00'
-                and segs[7] != 'fc00'
-            ):
-                return addr
-        return None
-
     def get_addr_leader_aloc(self):
         addrs = self.get_addrs()
         for addr in addrs: