diff --git a/tests/scripts/thread-cert/Cert_5_1_12_NewRouterNeighborSync.py b/tests/scripts/thread-cert/Cert_5_1_12_NewRouterNeighborSync.py
index 453fcca3e..9af0f6662 100755
--- a/tests/scripts/thread-cert/Cert_5_1_12_NewRouterNeighborSync.py
+++ b/tests/scripts/thread-cert/Cert_5_1_12_NewRouterNeighborSync.py
@@ -199,10 +199,8 @@ class Cert_5_1_12_NewRouterSync(thread_cert.TestCase):
                                   LINK_MARGIN_TLV,
                                   RESPONSE_TLV,
                                   SOURCE_ADDRESS_TLV,
-                                  VERSION_TLV,
-                                  TLV_REQUEST_TLV,
-                                  LINK_MARGIN_TLV
-                                   } <= set(p.mle.tlv.type) and\
+                                  VERSION_TLV
+                                  } <= set(p.mle.tlv.type) and\
                        p.mle.tlv.link_margin is not nullField
                        ).\
                        must_next()