diff --git a/test/functional/feature_config_args.py b/test/functional/feature_config_args.py
index 5f5e7e8f7..af2ba3e5f 100755
--- a/test/functional/feature_config_args.py
+++ b/test/functional/feature_config_args.py
@@ -1,98 +1,108 @@
 #!/usr/bin/env python3
 # Copyright (c) 2017-2019 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test various command line arguments and configuration file parameters."""
 import os
 
 from test_framework.test_framework import BitcoinTestFramework
 
 
 class ConfArgsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
 
     def test_config_file_parser(self):
         # Assume node is stopped
 
         inc_conf_file_path = os.path.join(
             self.nodes[0].datadir, 'include.conf')
         with open(os.path.join(self.nodes[0].datadir, 'bitcoin.conf'), 'a', encoding='utf-8') as conf:
             conf.write('includeconf={}\n'.format(inc_conf_file_path))
 
+        self.nodes[0].assert_start_raises_init_error(
+            expected_msg='Error parsing command line arguments: Invalid parameter -dash_cli',
+            extra_args=['-dash_cli=1'],
+        )
+        with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
+            conf.write('dash_conf=1\n')
+        with self.nodes[0].assert_debug_log(expected_msgs=['Ignoring unknown configuration value dash_conf']):
+            self.start_node(0)
+        self.stop_node(0)
+
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('-dash=1\n')
         self.nodes[0].assert_start_raises_init_error(
             expected_msg='Error reading configuration file: parse error on line 1: -dash=1, options in configuration file must be specified without leading -')
 
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('nono\n')
         self.nodes[0].assert_start_raises_init_error(
             expected_msg='Error reading configuration file: parse error on line 1: nono, if you intended to specify a negated option, use nono=1 instead')
 
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('server=1\nrpcuser=someuser\nrpcpassword=some#pass')
         self.nodes[0].assert_start_raises_init_error(
             expected_msg='Error reading configuration file: parse error on line 3, using # in rpcpassword can be ambiguous and should be avoided')
 
         with open(inc_conf_file_path, 'w', encoding='utf-8') as conf:
             conf.write('')  # clear
 
     def test_log_buffer(self):
         with self.nodes[0].assert_debug_log(expected_msgs=['Warning: parsed potentially confusing double-negative -connect=0']):
             self.start_node(0, extra_args=['-noconnect=0'])
         self.stop_node(0)
 
     def run_test(self):
         self.stop_node(0)
 
         self.test_log_buffer()
 
         self.test_config_file_parser()
 
         # Remove the -datadir argument so it doesn't override the config file
         self.nodes[0].remove_default_args(["-datadir"])
 
         default_data_dir = self.nodes[0].datadir
         new_data_dir = os.path.join(default_data_dir, 'newdatadir')
         new_data_dir_2 = os.path.join(default_data_dir, 'newdatadir2')
 
         # Check that using -datadir argument on non-existent directory fails
         self.nodes[0].datadir = new_data_dir
         self.nodes[0].assert_start_raises_init_error(
             ['-datadir=' + new_data_dir], 'Error: Specified data directory "' + new_data_dir + '" does not exist.')
 
         # Check that using non-existent datadir in conf file fails
         conf_file = os.path.join(default_data_dir, "bitcoin.conf")
 
         # datadir needs to be set before [regtest] section
         conf_file_contents = open(conf_file, encoding='utf8').read()
         with open(conf_file, 'w', encoding='utf8') as f:
             f.write("datadir=" + new_data_dir + "\n")
             f.write(conf_file_contents)
 
         self.nodes[0].assert_start_raises_init_error(
             ['-conf=' + conf_file], 'Error reading configuration file: specified data directory "' + new_data_dir + '" does not exist.')
 
         # Create the directory and ensure the config file now works
         os.mkdir(new_data_dir)
         self.start_node(0, ['-conf=' + conf_file, '-wallet=w1'])
         self.stop_node(0)
         assert os.path.exists(os.path.join(
             new_data_dir, 'regtest', 'wallets', 'w1'))
 
         # Ensure command line argument overrides datadir in conf
         os.mkdir(new_data_dir_2)
         self.nodes[0].datadir = new_data_dir_2
         self.start_node(0, ['-datadir=' + new_data_dir_2,
                             '-conf=' + conf_file, '-wallet=w2'])
         assert os.path.exists(os.path.join(
             new_data_dir_2, 'regtest', 'wallets', 'w2'))
 
 
 if __name__ == '__main__':
     ConfArgsTest().main()