diff --git a/tools/harness-thci/OpenThread.py b/tools/harness-thci/OpenThread.py
index d1d3d7524..3fc345ae8 100644
--- a/tools/harness-thci/OpenThread.py
+++ b/tools/harness-thci/OpenThread.py
@@ -1369,7 +1369,7 @@ class OpenThreadTHCI(object):
 
         while time.time() < start_time + timeout:
             time.sleep(0.3)
-            if TESTHARNESS_VERSION == TESTHARNESS_1_2 and not self.IsBorderRouter:
+            if not self.IsBorderRouter:
                 self._disconnect()
                 self._connect()
             try:
@@ -1493,7 +1493,7 @@ class OpenThreadTHCI(object):
         start_time = time.time()
         while time.time() < start_time + timeout:
             time.sleep(0.3)
-            if TESTHARNESS_VERSION == TESTHARNESS_1_2 and not self.IsBorderRouter:
+            if not self.IsBorderRouter:
                 self._disconnect()
                 self._connect()
             try:
diff --git a/tools/harness-thci/OpenThread_BR.py b/tools/harness-thci/OpenThread_BR.py
index 49de6d0e6..47a25f327 100644
--- a/tools/harness-thci/OpenThread_BR.py
+++ b/tools/harness-thci/OpenThread_BR.py
@@ -423,7 +423,7 @@ class OpenThread_BR(OpenThreadTHCI, IThci):
         )
 
         self.bash(cmd)
-        time.sleep(1)
+        time.sleep(timeout)
 
     def multicast_Ping(self, destination, length=20):
         """send ICMPv6 echo request with a given length to a multicast destination