diff --git a/test/functional/interface_rpc.py b/test/functional/interface_rpc.py
index 24a5f8e75..e44a6777f 100755
--- a/test/functional/interface_rpc.py
+++ b/test/functional/interface_rpc.py
@@ -1,86 +1,86 @@
 #!/usr/bin/env python3
 # Copyright (c) 2018-2019 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Tests some generic aspects of the RPC interface."""
 
 import os
 
 from test_framework.authproxy import JSONRPCException
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_greater_than_or_equal
 
 
 def expect_http_status(expected_http_status, expected_rpc_code,
                        fcn, *args):
     try:
         fcn(*args)
         raise AssertionError(
             "Expected RPC error {}, got none".format(expected_rpc_code))
     except JSONRPCException as exc:
         assert_equal(exc.error["code"], expected_rpc_code)
         assert_equal(exc.http_status, expected_http_status)
 
 
 class RPCInterfaceTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
         self.setup_clean_chain = True
         self.supports_cli = False
 
     def test_getrpcinfo(self):
         self.log.info("Testing getrpcinfo...")
 
         info = self.nodes[0].getrpcinfo()
         assert_equal(len(info['active_commands']), 1)
 
         command = info['active_commands'][0]
         assert_equal(command['method'], 'getrpcinfo')
         assert_greater_than_or_equal(command['duration'], 0)
         assert_equal(
             info['logpath'],
             os.path.join(
                 self.nodes[0].datadir,
                 self.chain,
                 'debug.log'))
 
     def test_batch_request(self):
         self.log.info("Testing basic JSON-RPC batch request...")
 
         results = self.nodes[0].batch([
             # A basic request that will work fine.
             {"method": "getblockcount", "id": 1},
             # Request that will fail.  The whole batch request should still
             # work fine.
             {"method": "invalidmethod", "id": 2},
             # Another call that should succeed.
-            {"method": "getbestblockhash", "id": 3},
+            {"method": "getblockhash", "id": 3, "params": [0]},
         ])
 
         result_by_id = {}
         for res in results:
             result_by_id[res["id"]] = res
 
         assert_equal(result_by_id[1]['error'], None)
         assert_equal(result_by_id[1]['result'], 0)
 
         assert_equal(result_by_id[2]['error']['code'], -32601)
         assert_equal(result_by_id[2]['result'], None)
 
         assert_equal(result_by_id[3]['error'], None)
         assert result_by_id[3]['result'] is not None
 
     def test_http_status_codes(self):
         self.log.info("Testing HTTP status codes for JSON-RPC requests...")
 
         expect_http_status(404, -32601, self.nodes[0].invalidmethod)
         expect_http_status(500, -8, self.nodes[0].getblockhash, 42)
 
     def run_test(self):
         self.test_getrpcinfo()
         self.test_batch_request()
         self.test_http_status_codes()
 
 
 if __name__ == '__main__':
     RPCInterfaceTest().main()