diff --git a/tests/scripts/thread-cert/test_ping_lla_src.py b/tests/scripts/thread-cert/test_ping_lla_src.py
new file mode 100644
index 000000000..2c73b1ce3
--- /dev/null
+++ b/tests/scripts/thread-cert/test_ping_lla_src.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+#
+#  Copyright (c) 2021, 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 logging
+import unittest
+
+import pktverify
+from pktverify import packet_verifier
+import config
+import thread_cert
+
+# Test description:
+# The purpose of this test is to verify the Router's routing behavior using LLA as source address.
+#
+# Topology:
+#
+#
+#  ROUTER_2 ----- ROUTER_1 ---- ROUTER_3
+#
+#
+
+ROUTER_1 = 1
+ROUTER_2 = 2
+ROUTER_3 = 3
+
+
+class TestPing(thread_cert.TestCase):
+    USE_MESSAGE_FACTORY = False
+    SUPPORT_NCP = False
+
+    TOPOLOGY = {
+        ROUTER_1: {
+            'name': 'Router_1',
+            'allowlist': [ROUTER_2, ROUTER_3],
+        },
+        ROUTER_2: {
+            'name': 'Router_2',
+            'allowlist': [ROUTER_1],
+        },
+        ROUTER_3: {
+            'name': 'Router_3',
+            'allowlist': [ROUTER_1],
+        },
+    }
+
+    def test(self):
+        router1 = self.nodes[ROUTER_1]
+        router2 = self.nodes[ROUTER_2]
+        router3 = self.nodes[ROUTER_3]
+
+        router1.start()
+        self.simulator.go(5)
+        self.assertEqual('leader', router1.get_state())
+
+        router2.start()
+        self.simulator.go(5)
+        self.assertEqual('router', router2.get_state())
+
+        router3.start()
+        self.simulator.go(5)
+        self.assertEqual('router', router3.get_state())
+
+        self.simulator.go(10)
+
+        left, center, right = router2, router1, router3
+
+        left_lla = left.get_ip6_address(config.ADDRESS_TYPE.LINK_LOCAL)
+
+        # Ping a neighbor with LLA src should succeed.
+        self.assertTrue(left.ping(center.get_mleid(), interface=left_lla))
+        self.simulator.go(3)
+
+        # Ping a non-neighbor with LLA src should fail.
+        self.assertFalse(left.ping(right.get_mleid(), interface=left_lla))
+        self.simulator.go(3)
+
+        center.add_route('2001::/64', stable=True)
+        center.register_netdata()
+
+        self.simulator.go(3)
+
+        # Make sure external routes are not used for LLA src.
+        self.assertFalse(left.ping("2001::1", interface=left_lla))
+        self.simulator.go(3)
+
+    def verify(self, pv: pktverify.packet_verifier.PacketVerifier):
+        pkts = pv.pkts
+        # Make sure the Ping Request to 2001::1 was not sent
+        pkts.filter_ipv6_dst('2001::1').filter_ping_request().must_not_next()
+
+
+if __name__ == '__main__':
+    unittest.main()