diff --git a/qa/pull-tester/rpc-tests.sh b/qa/pull-tester/rpc-tests.sh
index 07789a03a..9900b1c20 100755
--- a/qa/pull-tester/rpc-tests.sh
+++ b/qa/pull-tester/rpc-tests.sh
@@ -56,6 +56,7 @@ testScripts=(
     'bipdersig-p2p.py'
     'overwinter_peer_management.py'
     'rewind_index.py'
+    'p2p_txexpiry_dos.py'
 );
 testScriptsExt=(
     'getblocktemplate_longpoll.py'
diff --git a/qa/rpc-tests/p2p_txexpiry_dos.py b/qa/rpc-tests/p2p_txexpiry_dos.py
new file mode 100755
index 000000000..477fc5c01
--- /dev/null
+++ b/qa/rpc-tests/p2p_txexpiry_dos.py
@@ -0,0 +1,120 @@
+#!/usr/bin/env python2
+# Copyright (c) 2018 The Zcash developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+from test_framework.mininode import NodeConn, NodeConnCB, NetworkThread, \
+    CTransaction, msg_tx, mininode_lock, OVERWINTER_PROTO_VERSION
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import initialize_chain_clean, start_nodes, \
+    p2p_port, assert_equal
+
+import time, cStringIO
+from binascii import hexlify, unhexlify
+
+
+class TestNode(NodeConnCB):
+    def __init__(self):
+        NodeConnCB.__init__(self)
+        self.create_callback_map()
+        self.connection = None
+
+    def add_connection(self, conn):
+        self.connection = conn
+
+    # Spin until verack message is received from the node.
+    # We use this to signal that our test can begin. This
+    # is called from the testing thread, so it needs to acquire
+    # the global lock.
+    def wait_for_verack(self):
+        while True:
+            with mininode_lock:
+                if self.verack_received:
+                    return
+            time.sleep(0.05)
+
+    # Wrapper for the NodeConn's send_message function
+    def send_message(self, message):
+        self.connection.send_message(message)
+
+    def on_close(self, conn):
+        pass
+
+    def on_reject(self, conn, message):
+        conn.rejectMessage = message
+
+
+class TxExpiryDoSTest(BitcoinTestFramework):
+
+    def setup_chain(self):
+        print "Initializing test directory "+self.options.tmpdir
+        initialize_chain_clean(self.options.tmpdir, 1)
+
+    def setup_network(self):
+        self.nodes = start_nodes(1, self.options.tmpdir,
+                                 extra_args=[['-nuparams=5ba81b19:10']])
+
+    def create_transaction(self, node, coinbase, to_address, amount, txModifier=None):
+        from_txid = node.getblock(coinbase)['tx'][0]
+        inputs = [{ "txid" : from_txid, "vout" : 0}]
+        outputs = { to_address : amount }
+        rawtx = node.createrawtransaction(inputs, outputs)
+        tx = CTransaction()
+
+        if txModifier:
+            f = cStringIO.StringIO(unhexlify(rawtx))
+            tx.deserialize(f)
+            txModifier(tx)
+            rawtx = hexlify(tx.serialize())
+
+        signresult = node.signrawtransaction(rawtx)
+        f = cStringIO.StringIO(unhexlify(signresult['hex']))
+        tx.deserialize(f)
+        return tx
+
+    def run_test(self):
+        test_node = TestNode()
+
+        connections = []
+        connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0],
+                                    test_node, "regtest", True))
+        test_node.add_connection(connections[0])
+
+        # Start up network handling in another thread
+        NetworkThread().start()
+
+        test_node.wait_for_verack()
+
+        # Verify mininodes are connected to zcashd nodes
+        peerinfo = self.nodes[0].getpeerinfo()
+        versions = [x["version"] for x in peerinfo]
+        assert_equal(1, versions.count(OVERWINTER_PROTO_VERSION))
+        assert_equal(0, peerinfo[0]["banscore"])
+
+        self.coinbase_blocks = self.nodes[0].generate(1)
+        self.nodes[0].generate(100)
+        self.nodeaddress = self.nodes[0].getnewaddress()
+
+        # Mininodes send transaction to zcashd node.
+        def setExpiryHeight(tx):
+            tx.nExpiryHeight = 1
+
+        spendtx = self.create_transaction(self.nodes[0],
+                                          self.coinbase_blocks[0],
+                                          self.nodeaddress, 1.0,
+                                          txModifier=setExpiryHeight)
+        test_node.send_message(msg_tx(spendtx))
+
+        time.sleep(3)
+
+        # Verify test mininode has not been dropped
+        # and still has a banscore of 0.
+        peerinfo = self.nodes[0].getpeerinfo()
+        versions = [x["version"] for x in peerinfo]
+        assert_equal(1, versions.count(OVERWINTER_PROTO_VERSION))
+        assert_equal(0, peerinfo[0]["banscore"])
+
+        [ c.disconnect_node() for c in connections ]
+
+if __name__ == '__main__':
+    TxExpiryDoSTest().main()