diff --git a/tests/scripts/Makefile.am b/tests/scripts/Makefile.am
index c120be3d2..5d8e65a5a 100644
--- a/tests/scripts/Makefile.am
+++ b/tests/scripts/Makefile.am
@@ -67,7 +67,6 @@ EXTRA_DIST                                                         = \
     thread-cert/Cert_5_5_03_SplitMergeChildren.py                    \
     thread-cert/Cert_5_5_04_SplitMergeRouters.py                     \
     thread-cert/Cert_5_5_05_SplitMergeREED.py                        \
-    thread-cert/Cert_5_5_06_SplitWeight.py                           \
     thread-cert/Cert_5_5_07_SplitMergeThreeWay.py                    \
     thread-cert/Cert_5_5_08_SplitRoutersLostLeader.py                \
     thread-cert/Cert_5_6_01_NetworkDataRegisterBeforeAttachLeader.py \
@@ -225,7 +224,6 @@ check_SCRIPTS                                                     += \
     thread-cert/Cert_5_5_03_SplitMergeChildren.py                    \
     thread-cert/Cert_5_5_04_SplitMergeRouters.py                     \
     thread-cert/Cert_5_5_05_SplitMergeREED.py                        \
-    thread-cert/Cert_5_5_06_SplitWeight.py                           \
     thread-cert/Cert_5_5_07_SplitMergeThreeWay.py                    \
     thread-cert/Cert_5_5_08_SplitRoutersLostLeader.py                \
     thread-cert/Cert_5_6_01_NetworkDataRegisterBeforeAttachLeader.py \
diff --git a/tests/scripts/thread-cert/Cert_5_5_06_SplitWeight.py b/tests/scripts/thread-cert/Cert_5_5_06_SplitWeight.py
deleted file mode 100755
index acb505f8d..000000000
--- a/tests/scripts/thread-cert/Cert_5_5_06_SplitWeight.py
+++ /dev/null
@@ -1,97 +0,0 @@
-#!/usr/bin/python
-#
-#  Copyright (c) 2016, The OpenThread Authors.
-#  All rights reserved.
-#
-#  Redistribution and use in source and binary forms, with or without
-#  modification, are permitted provided that the following conditions are met:
-#  1. Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#  2. Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in the
-#     documentation and/or other materials provided with the distribution.
-#  3. Neither the name of the copyright holder nor the
-#     names of its contributors may be used to endorse or promote products
-#     derived from this software without specific prior written permission.
-#
-#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-#  POSSIBILITY OF SUCH DAMAGE.
-#
-
-import time
-import unittest
-
-import node
-
-LEADER1 = 1
-ROUTER1 = 2
-ROUTER2 = 3
-
-class Cert_5_5_6_SplitWeight(unittest.TestCase):
-    def setUp(self):
-        self.nodes = {}
-        for i in range(1,4):
-            self.nodes[i] = node.Node(i)
-
-        self.nodes[LEADER1].set_panid(0xface)
-        self.nodes[LEADER1].set_mode('rsdn')
-        self.nodes[LEADER1].add_whitelist(self.nodes[ROUTER1].get_addr64())
-        self.nodes[LEADER1].add_whitelist(self.nodes[ROUTER2].get_addr64())
-        self.nodes[LEADER1].enable_whitelist()
-        self.nodes[LEADER1].set_weight(2)
-
-        self.nodes[ROUTER1].set_panid(0xface)
-        self.nodes[ROUTER1].set_mode('rsdn')
-        self.nodes[ROUTER1].add_whitelist(self.nodes[LEADER1].get_addr64())
-        self.nodes[ROUTER1].enable_whitelist()
-        self.nodes[ROUTER1].set_weight(1)
-        self.nodes[ROUTER1].set_router_selection_jitter(1)
-
-        self.nodes[ROUTER2].set_panid(0xface)
-        self.nodes[ROUTER2].set_mode('rsdn')
-        self.nodes[ROUTER2].add_whitelist(self.nodes[LEADER1].get_addr64())
-        self.nodes[ROUTER2].enable_whitelist()
-        self.nodes[ROUTER2].set_weight(0)
-        self.nodes[ROUTER2].set_router_selection_jitter(1)
-
-    def tearDown(self):
-        for node in list(self.nodes.values()):
-            node.stop()
-        del self.nodes
-
-    def test(self):
-        self.nodes[LEADER1].start()
-        self.nodes[LEADER1].set_state('leader')
-        self.assertEqual(self.nodes[LEADER1].get_state(), 'leader')
-
-        self.nodes[ROUTER1].start()
-        time.sleep(5)
-        self.assertEqual(self.nodes[ROUTER1].get_state(), 'router')
-
-        self.nodes[ROUTER2].start()
-        time.sleep(5)
-        self.assertEqual(self.nodes[ROUTER2].get_state(), 'router')
-
-        self.nodes[LEADER1].stop()
-        self.nodes[ROUTER1].add_whitelist(self.nodes[ROUTER2].get_addr64())
-        self.nodes[ROUTER2].add_whitelist(self.nodes[ROUTER1].get_addr64())
-        time.sleep(140)
-
-        self.assertEqual(self.nodes[ROUTER1].get_state(), 'leader')
-        self.assertEqual(self.nodes[ROUTER2].get_state(), 'router')
-
-        addrs = self.nodes[ROUTER2].get_addrs()
-        for addr in addrs:
-            self.assertTrue(self.nodes[ROUTER1].ping(addr))
-
-if __name__ == '__main__':
-    unittest.main()