diff --git a/qa/rpc-tests/test_framework/mininode.py b/qa/rpc-tests/test_framework/mininode.py
index 6da6bcbd63..b8ae3346b7 100755
--- a/qa/rpc-tests/test_framework/mininode.py
+++ b/qa/rpc-tests/test_framework/mininode.py
@@ -910,6 +910,37 @@ class CCbTx(object):
         return r
 
 
+class CSimplifiedMNListEntry(object):
+    def __init__(self):
+        self.set_null()
+
+    def set_null(self):
+        self.proRegTxHash = 0
+        self.confirmedHash = 0
+        self.service = CService()
+        self.pubKeyOperator = b'\\x0' * 48
+        self.keyIDVoting = 0
+        self.isValid = False
+
+    def deserialize(self, f):
+        self.proRegTxHash = deser_uint256(f)
+        self.confirmedHash = deser_uint256(f)
+        self.service.deserialize(f)
+        self.pubKeyOperator = f.read(48)
+        self.keyIDVoting = f.read(20)
+        self.isValid = struct.unpack("<?", f.read(1))[0]
+
+    def serialize(self):
+        r = b""
+        r += ser_uint256(self.proRegTxHash)
+        r += ser_uint256(self.confirmedHash)
+        r += self.service.serialize()
+        r += self.pubKeyOperator
+        r += self.keyIDVoting
+        r += struct.pack("<?", self.isValid)
+        return r
+
+
 # Objects that correspond to messages on the wire
 class msg_version(object):
     command = b"version"
@@ -1404,6 +1435,55 @@ class msg_blocktxn(object):
     def __repr__(self):
         return "msg_blocktxn(block_transactions=%s)" % (repr(self.block_transactions))
 
+class msg_getmnlistd(object):
+    command = b"getmnlistd"
+
+    def __init__(self, baseBlockHash=0, blockHash=0):
+        self.baseBlockHash = baseBlockHash
+        self.blockHash = blockHash
+
+    def deserialize(self, f):
+        self.baseBlockHash = deser_uint256(f)
+        self.blockHash = deser_uint256(f)
+
+    def serialize(self):
+        r = b""
+        r += ser_uint256(self.baseBlockHash)
+        r += ser_uint256(self.blockHash)
+        return r
+
+    def __repr__(self):
+        return "msg_getmnlistd(baseBlockHash=%064x, blockHash=%064x)" % (self.baseBlockHash, self.blockHash)
+
+class msg_mnlistdiff(object):
+    command = b"mnlistdiff"
+
+    def __init__(self):
+        self.baseBlockHash = 0
+        self.blockHash = 0
+        self.merkleProof = CPartialMerkleTree()
+        self.cbTx = None
+        self.deletedMNs = []
+        self.mnList = []
+
+    def deserialize(self, f):
+        self.baseBlockHash = deser_uint256(f)
+        self.blockHash = deser_uint256(f)
+        self.merkleProof.deserialize(f)
+        self.cbTx = CTransaction()
+        self.cbTx.deserialize(f)
+        self.cbTx.rehash()
+        self.deletedMNs = deser_uint256_vector(f)
+        self.mnList = []
+        for i in range(deser_compact_size(f)):
+            e = CSimplifiedMNListEntry()
+            e.deserialize(f)
+            self.mnList.append(e)
+
+    def __repr__(self):
+        return "msg_mnlistdiff(baseBlockHash=%064x, blockHash=%064x)" % (self.baseBlockHash, self.blockHash)
+
+
 # This is what a callback should look like for NodeConn
 # Reimplement the on_* functions to provide handling for events
 class NodeConnCB(object):
@@ -1487,6 +1567,7 @@ class NodeConnCB(object):
     def on_cmpctblock(self, conn, message): pass
     def on_getblocktxn(self, conn, message): pass
     def on_blocktxn(self, conn, message): pass
+    def on_mnlistdiff(self, conn, message): pass
 
 # More useful callbacks and functions for NodeConnCB's which have a single NodeConn
 class SingleNodeConnCB(NodeConnCB):
@@ -1543,7 +1624,8 @@ class NodeConn(asyncore.dispatcher):
         b"sendcmpct": msg_sendcmpct,
         b"cmpctblock": msg_cmpctblock,
         b"getblocktxn": msg_getblocktxn,
-        b"blocktxn": msg_blocktxn
+        b"blocktxn": msg_blocktxn,
+        b"mnlistdiff": msg_mnlistdiff
     }
     MAGIC_BYTES = {
         "mainnet": b"\xbf\x0c\x6b\xbd",   # mainnet