diff --git a/test/functional/combine_logs.py b/test/functional/combine_logs.py
index 91b6415a7c..464b78f775 100755
--- a/test/functional/combine_logs.py
+++ b/test/functional/combine_logs.py
@@ -23,6 +23,7 @@ def main():
     parser = argparse.ArgumentParser(usage='%(prog)s [options] <test temporary directory>', description=__doc__)
     parser.add_argument('-c', '--color', dest='color', action='store_true', help='outputs the combined log with events colored by source (requires posix terminal colors. Use less -r for viewing)')
     parser.add_argument('--html', dest='html', action='store_true', help='outputs the combined log as html. Requires jinja2. pip install jinja2')
+    parser.add_argument('--chain', dest='chain', help='selected chain in the tests (default: regtest)', default='regtest')
     args, unknown_args = parser.parse_known_args()
 
     if args.color and os.name != 'posix':
@@ -38,11 +39,11 @@ def main():
         print("Unexpected arguments" + str(unknown_args))
         sys.exit(1)
 
-    log_events = read_logs(unknown_args[0])
+    log_events = read_logs(unknown_args[0], args.chain)
 
     print_logs(log_events, color=args.color, html=args.html)
 
-def read_logs(tmp_dir):
+def read_logs(tmp_dir, chain):
     """Reads log files.
 
     Delegates to generator function get_log_events() to provide individual log events
@@ -50,7 +51,7 @@ def read_logs(tmp_dir):
 
     files = [("test", "%s/test_framework.log" % tmp_dir)]
     for i in itertools.count():
-        logfile = "{}/node{}/regtest/debug.log".format(tmp_dir, i)
+        logfile = "{}/node{}/{}/debug.log".format(tmp_dir, i, chain)
         if not os.path.isfile(logfile):
             break
         files.append(("node%d" % i, logfile))
diff --git a/test/functional/feature_blocksdir.py b/test/functional/feature_blocksdir.py
index 56f91651a8..b282126f2d 100755
--- a/test/functional/feature_blocksdir.py
+++ b/test/functional/feature_blocksdir.py
@@ -19,7 +19,7 @@ class BlocksdirTest(BitcoinTestFramework):
     def run_test(self):
         self.stop_node(0)
         shutil.rmtree(self.nodes[0].datadir)
-        initialize_datadir(self.options.tmpdir, 0)
+        initialize_datadir(self.options.tmpdir, 0, self.chain)
         self.log.info("Starting with non exiting blocksdir ...")
         blocksdir_path = os.path.join(self.options.tmpdir, 'blocksdir')
         self.nodes[0].assert_start_raises_init_error(["-blocksdir=" + blocksdir_path], 'Error: Specified blocks directory "{}" does not exist.'.format(blocksdir_path))
@@ -28,8 +28,8 @@ class BlocksdirTest(BitcoinTestFramework):
         self.start_node(0, ["-blocksdir=" + blocksdir_path])
         self.log.info("mining blocks..")
         self.nodes[0].generate(10)
-        assert os.path.isfile(os.path.join(blocksdir_path, "regtest", "blocks", "blk00000.dat"))
-        assert os.path.isdir(os.path.join(self.nodes[0].datadir, "regtest", "blocks", "index"))
+        assert os.path.isfile(os.path.join(blocksdir_path, self.chain, "blocks", "blk00000.dat"))
+        assert os.path.isdir(os.path.join(self.nodes[0].datadir, self.chain, "blocks", "index"))
 
 
 if __name__ == '__main__':
diff --git a/test/functional/feature_config_args.py b/test/functional/feature_config_args.py
index 9be59b32b4..3c10b255d0 100755
--- a/test/functional/feature_config_args.py
+++ b/test/functional/feature_config_args.py
@@ -65,13 +65,13 @@ class ConfArgsTest(BitcoinTestFramework):
         # Temporarily disabled, because this test would access the user's home dir (~/.bitcoin)
         #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'))
+        #assert os.path.exists(os.path.join(new_data_dir, self.chain, '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'))
+        assert os.path.exists(os.path.join(new_data_dir_2, self.chain, 'wallets', 'w2'))
 
 if __name__ == '__main__':
     ConfArgsTest().main()
diff --git a/test/functional/feature_logging.py b/test/functional/feature_logging.py
index 8bb7e02695..441716ab0b 100755
--- a/test/functional/feature_logging.py
+++ b/test/functional/feature_logging.py
@@ -16,7 +16,7 @@ class LoggingTest(BitcoinTestFramework):
         self.setup_clean_chain = True
 
     def relative_log_path(self, name):
-        return os.path.join(self.nodes[0].datadir, "regtest", name)
+        return os.path.join(self.nodes[0].datadir, self.chain, name)
 
     def run_test(self):
         # test default log file name
diff --git a/test/functional/feature_pruning.py b/test/functional/feature_pruning.py
index c8f4b7f8b5..bcf14a7b16 100755
--- a/test/functional/feature_pruning.py
+++ b/test/functional/feature_pruning.py
@@ -46,7 +46,7 @@ class PruneTest(BitcoinTestFramework):
     def setup_network(self):
         self.setup_nodes()
 
-        self.prunedir = os.path.join(self.nodes[2].datadir, 'regtest', 'blocks', '')
+        self.prunedir = os.path.join(self.nodes[2].datadir, self.chain, 'blocks', '')
 
         connect_nodes(self.nodes[0], 1)
         connect_nodes(self.nodes[1], 2)
@@ -257,7 +257,7 @@ class PruneTest(BitcoinTestFramework):
                 assert_equal(ret, expected_ret)
 
         def has_block(index):
-            return os.path.isfile(os.path.join(self.nodes[node_number].datadir, "regtest", "blocks", "blk{:05}.dat".format(index)))
+            return os.path.isfile(os.path.join(self.nodes[node_number].datadir, self.chain, "blocks", "blk{:05}.dat".format(index)))
 
         # should not prune because chain tip of node 3 (995) < PruneAfterHeight (1000)
         assert_raises_rpc_error(-1, "Blockchain is too short for pruning", node.pruneblockchain, height(500))
diff --git a/test/functional/interface_bitcoin_cli.py b/test/functional/interface_bitcoin_cli.py
index d3b85ce948..251ee0dcc4 100755
--- a/test/functional/interface_bitcoin_cli.py
+++ b/test/functional/interface_bitcoin_cli.py
@@ -28,7 +28,7 @@ class TestBitcoinCli(BitcoinTestFramework):
         rpc_response = self.nodes[0].getblockchaininfo()
         assert_equal(cli_response, rpc_response)
 
-        user, password = get_auth_cookie(self.nodes[0].datadir)
+        user, password = get_auth_cookie(self.nodes[0].datadir, self.chain)
 
         self.log.info("Test -stdinrpcpass option")
         assert_equal(0, self.nodes[0].cli('-rpcuser=%s' % user, '-stdinrpcpass', input=password).getblockcount())
diff --git a/test/functional/mempool_persist.py b/test/functional/mempool_persist.py
index 6e5f89efb8..724022635a 100755
--- a/test/functional/mempool_persist.py
+++ b/test/functional/mempool_persist.py
@@ -94,8 +94,8 @@ class MempoolPersistTest(BitcoinTestFramework):
         self.start_node(0)
         wait_until(lambda: len(self.nodes[0].getrawmempool()) == 5)
 
-        mempooldat0 = os.path.join(self.nodes[0].datadir, 'regtest', 'mempool.dat')
-        mempooldat1 = os.path.join(self.nodes[1].datadir, 'regtest', 'mempool.dat')
+        mempooldat0 = os.path.join(self.nodes[0].datadir, self.chain, 'mempool.dat')
+        mempooldat1 = os.path.join(self.nodes[1].datadir, self.chain, 'mempool.dat')
         self.log.debug("Remove the mempool.dat file. Verify that savemempool to disk via RPC re-creates it")
         os.remove(mempooldat0)
         self.nodes[0].savemempool()
diff --git a/test/functional/mining_basic.py b/test/functional/mining_basic.py
index fa20a2d2f4..a99c2fc8d4 100755
--- a/test/functional/mining_basic.py
+++ b/test/functional/mining_basic.py
@@ -37,7 +37,7 @@ class MiningTest(BitcoinTestFramework):
         self.log.info('getmininginfo')
         mining_info = node.getmininginfo()
         assert_equal(mining_info['blocks'], 200)
-        assert_equal(mining_info['chain'], 'regtest')
+        assert_equal(mining_info['chain'], self.chain)
         assert_equal(mining_info['currentblocktx'], 0)
         assert_equal(mining_info['currentblockweight'], 0)
         assert_equal(mining_info['difficulty'], Decimal('4.656542373906925E-10'))
diff --git a/test/functional/rpc_bind.py b/test/functional/rpc_bind.py
index 53916d5290..c151094ff7 100755
--- a/test/functional/rpc_bind.py
+++ b/test/functional/rpc_bind.py
@@ -52,7 +52,7 @@ class RPCBindTest(BitcoinTestFramework):
         self.nodes[0].rpchost = None
         self.start_nodes([base_args])
         # connect to node through non-loopback interface
-        node = get_rpc_proxy(rpc_url(self.nodes[0].datadir, 0, "%s:%d" % (rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
+        node = get_rpc_proxy(rpc_url(self.nodes[0].datadir, 0, self.chain, "%s:%d" % (rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
         node.getnetworkinfo()
         self.stop_nodes()
 
diff --git a/test/functional/rpc_scantxoutset.py b/test/functional/rpc_scantxoutset.py
index ceb38e969a..c338418703 100755
--- a/test/functional/rpc_scantxoutset.py
+++ b/test/functional/rpc_scantxoutset.py
@@ -47,7 +47,7 @@ class ScantxoutsetTest(BitcoinTestFramework):
 
         self.log.info("Stop node, remove wallet, mine again some blocks...")
         self.stop_node(0)
-        shutil.rmtree(os.path.join(self.nodes[0].datadir, "regtest", 'wallets'))
+        shutil.rmtree(os.path.join(self.nodes[0].datadir, self.chain, 'wallets'))
         self.start_node(0)
         self.nodes[0].generate(110)
 
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index b876d9bd76..ec942b174c 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -82,6 +82,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
 
     def __init__(self):
         """Sets test framework defaults. Do not override this method. Instead, override the set_test_params() method"""
+        self.chain = "regtest"
         self.setup_clean_chain = False
         self.nodes = []
         self.network_thread = None
@@ -267,7 +268,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         assert_equal(len(extra_args), num_nodes)
         assert_equal(len(binary), num_nodes)
         for i in range(num_nodes):
-            self.nodes.append(TestNode(i, get_datadir_path(self.options.tmpdir, i), rpchost=rpchost, timewait=self.rpc_timewait, bitcoind=binary[i], bitcoin_cli=self.options.bitcoincli, mocktime=self.mocktime, coverage_dir=self.options.coveragedir, extra_conf=extra_confs[i], extra_args=extra_args[i], use_cli=self.options.usecli))
+            self.nodes.append(TestNode(i, get_datadir_path(self.options.tmpdir, i), self.chain, rpchost=rpchost, timewait=self.rpc_timewait, bitcoind=binary[i], bitcoin_cli=self.options.bitcoincli, mocktime=self.mocktime, coverage_dir=self.options.coveragedir, extra_conf=extra_confs[i], extra_args=extra_args[i], use_cli=self.options.usecli))
 
     def start_node(self, i, *args, **kwargs):
         """Start a bitcoind"""
@@ -414,11 +415,11 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
 
             # Create cache directories, run bitcoinds:
             for i in range(MAX_NODES):
-                datadir = initialize_datadir(self.options.cachedir, i)
+                datadir = initialize_datadir(self.options.cachedir, i, self.chain)
                 args = [self.options.bitcoind, "-datadir=" + datadir]
                 if i > 0:
                     args.append("-connect=127.0.0.1:" + str(p2p_port(0)))
-                self.nodes.append(TestNode(i, get_datadir_path(self.options.cachedir, i), extra_conf=["bind=127.0.0.1"], extra_args=[], rpchost=None, timewait=self.rpc_timewait, bitcoind=self.options.bitcoind, bitcoin_cli=self.options.bitcoincli, mocktime=self.mocktime, coverage_dir=None))
+                self.nodes.append(TestNode(i, get_datadir_path(self.options.cachedir, i), self.chain, extra_conf=["bind=127.0.0.1"], extra_args=[], rpchost=None, timewait=self.rpc_timewait, bitcoind=self.options.bitcoind, bitcoin_cli=self.options.bitcoincli, mocktime=self.mocktime, coverage_dir=None))
                 self.nodes[i].args = args
                 self.start_node(i)
 
@@ -450,7 +451,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
             self.disable_mocktime()
 
             def cache_path(n, *paths):
-                return os.path.join(get_datadir_path(self.options.cachedir, n), "regtest", *paths)
+                return os.path.join(get_datadir_path(self.options.cachedir, n), self.chain, *paths)
 
             for i in range(MAX_NODES):
                 for entry in os.listdir(cache_path(i)):
@@ -461,7 +462,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
             from_dir = get_datadir_path(self.options.cachedir, i)
             to_dir = get_datadir_path(self.options.tmpdir, i)
             shutil.copytree(from_dir, to_dir)
-            initialize_datadir(self.options.tmpdir, i)  # Overwrite port/rpcport in bitcoin.conf
+            initialize_datadir(self.options.tmpdir, i, self.chain)  # Overwrite port/rpcport in bitcoin.conf
 
     def _initialize_chain_clean(self):
         """Initialize empty blockchain for use by the test.
@@ -469,7 +470,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         Create an empty blockchain and num_nodes wallets.
         Useful if a test case wants complete control over initialization."""
         for i in range(self.num_nodes):
-            initialize_datadir(self.options.tmpdir, i)
+            initialize_datadir(self.options.tmpdir, i, self.chain)
 
 
 class SkipTest(Exception):
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
index 0d00cc2082..d400a50bd2 100755
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -57,11 +57,12 @@ class TestNode():
     To make things easier for the test writer, any unrecognised messages will
     be dispatched to the RPC connection."""
 
-    def __init__(self, i, datadir, *, rpchost, timewait, bitcoind, bitcoin_cli, mocktime, coverage_dir, extra_conf=None, extra_args=None, use_cli=False):
+    def __init__(self, i, datadir, chain, *, rpchost, timewait, bitcoind, bitcoin_cli, mocktime, coverage_dir, extra_conf=None, extra_args=None, use_cli=False):
         self.index = i
         self.datadir = datadir
         self.stdout_dir = os.path.join(self.datadir, "stdout")
         self.stderr_dir = os.path.join(self.datadir, "stderr")
+        self.chain = chain
         self.rpchost = rpchost
         self.rpc_timeout = timewait
         self.binary = bitcoind
@@ -83,7 +84,7 @@ class TestNode():
             "-uacomment=testnode%d" % i
         ]
 
-        self.cli = TestNodeCLI(bitcoin_cli, self.datadir)
+        self.cli = TestNodeCLI(bitcoin_cli, self.datadir, self.chain)
         self.use_cli = use_cli
 
         self.running = False
@@ -138,7 +139,7 @@ class TestNode():
         # Delete any existing cookie file -- if such a file exists (eg due to
         # unclean shutdown), it will get overwritten anyway by bitcoind, and
         # potentially interfere with our attempt to authenticate
-        delete_cookie_file(self.datadir)
+        delete_cookie_file(self.datadir, self.chain)
 
         # add environment variable LIBC_FATAL_STDERR_=1 so that libc errors are written to stderr and not the terminal
         subp_env = dict(os.environ, LIBC_FATAL_STDERR_="1")
@@ -157,7 +158,7 @@ class TestNode():
                 raise FailedToStartError(self._node_msg(
                     'bitcoind exited with status {} during initialization'.format(self.process.returncode)))
             try:
-                self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.rpchost), self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir)
+                self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.chain, self.rpchost), self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir)
                 self.rpc.getblockcount()
                 # If the call to getblockcount() succeeds then the RPC connection is up
                 self.rpc_connected = True
@@ -325,16 +326,17 @@ class TestNodeCLIAttr:
 class TestNodeCLI():
     """Interface to bitcoin-cli for an individual node"""
 
-    def __init__(self, binary, datadir):
+    def __init__(self, binary, datadir, chain):
         self.options = []
         self.binary = binary
         self.datadir = datadir
+        self.chain = chain
         self.input = None
         self.log = logging.getLogger('TestFramework.bitcoincli')
 
     def __call__(self, *options, input=None):
         # TestNodeCLI is callable with bitcoin-cli command-line options
-        cli = TestNodeCLI(self.binary, self.datadir)
+        cli = TestNodeCLI(self.binary, self.datadir, self.chain)
         cli.options = [str(o) for o in options]
         cli.input = input
         return cli
@@ -356,7 +358,7 @@ class TestNodeCLI():
         pos_args = [str(arg).lower() if type(arg) is bool else str(arg) for arg in args]
         named_args = [str(key) + "=" + str(value) for (key, value) in kwargs.items()]
         assert not (pos_args and named_args), "Cannot use positional arguments and named arguments in the same bitcoin-cli call"
-        p_args = [self.binary, "-datadir=" + self.datadir] + self.options
+        p_args = [self.binary, "-datadir=" + self.datadir, "-chain=" + self.chain] + self.options
         if named_args:
             p_args += ["-named"]
         if command is not None:
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index b355816d8b..a06435200e 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -273,8 +273,8 @@ def p2p_port(n):
 def rpc_port(n):
     return PORT_MIN + PORT_RANGE + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)
 
-def rpc_url(datadir, i, rpchost=None):
-    rpc_u, rpc_p = get_auth_cookie(datadir)
+def rpc_url(datadir, i, chain, rpchost=None):
+    rpc_u, rpc_p = get_auth_cookie(datadir, chain)
     host = '127.0.0.1'
     port = rpc_port(i)
     if rpchost:
@@ -288,13 +288,16 @@ def rpc_url(datadir, i, rpchost=None):
 # Node functions
 ################
 
-def initialize_datadir(dirname, n):
+def get_datadir_path(dirname, n):
+    return os.path.join(dirname, "node" + str(n))
+
+def initialize_datadir(dirname, n, chain):
     datadir = get_datadir_path(dirname, n)
     if not os.path.isdir(datadir):
         os.makedirs(datadir)
     with open(os.path.join(datadir, "bitcoin.conf"), 'w', encoding='utf8') as f:
-        f.write("regtest=1\n")
-        f.write("[regtest]\n")
+        f.write("chain=%s\n" % chain)
+        f.write("[%s]\n" % chain)
         f.write("port=" + str(p2p_port(n)) + "\n")
         f.write("rpcport=" + str(rpc_port(n)) + "\n")
         f.write("server=1\n")
@@ -306,15 +309,12 @@ def initialize_datadir(dirname, n):
         os.makedirs(os.path.join(datadir, 'stdout'), exist_ok=True)
     return datadir
 
-def get_datadir_path(dirname, n):
-    return os.path.join(dirname, "node" + str(n))
-
 def append_config(datadir, options):
     with open(os.path.join(datadir, "bitcoin.conf"), 'a', encoding='utf8') as f:
         for option in options:
             f.write(option + "\n")
 
-def get_auth_cookie(datadir):
+def get_auth_cookie(datadir, chain):
     user = None
     password = None
     if os.path.isfile(os.path.join(datadir, "bitcoin.conf")):
@@ -326,8 +326,8 @@ def get_auth_cookie(datadir):
                 if line.startswith("rpcpassword="):
                     assert password is None  # Ensure that there is only one rpcpassword line
                     password = line.split("=")[1].strip("\n")
-    if os.path.isfile(os.path.join(datadir, "regtest", ".cookie")):
-        with open(os.path.join(datadir, "regtest", ".cookie"), 'r', encoding="ascii") as f:
+    if os.path.isfile(os.path.join(datadir, chain, ".cookie")):
+        with open(os.path.join(datadir, chain, ".cookie"), 'r', encoding="ascii") as f:
             userpass = f.read()
             split_userpass = userpass.split(':')
             user = split_userpass[0]
@@ -337,10 +337,10 @@ def get_auth_cookie(datadir):
     return user, password
 
 # If a cookie file exists in the given datadir, delete it.
-def delete_cookie_file(datadir):
-    if os.path.isfile(os.path.join(datadir, "regtest", ".cookie")):
+def delete_cookie_file(datadir, chain):
+    if os.path.isfile(os.path.join(datadir, chain, ".cookie")):
         logger.debug("Deleting leftover cookie file")
-        os.remove(os.path.join(datadir, "regtest", ".cookie"))
+        os.remove(os.path.join(datadir, chain, ".cookie"))
 
 def get_bip9_status(node, key):
     info = node.getblockchaininfo()
diff --git a/test/functional/wallet_backup.py b/test/functional/wallet_backup.py
index 4ef8f4776b..5d3366f238 100755
--- a/test/functional/wallet_backup.py
+++ b/test/functional/wallet_backup.py
@@ -92,9 +92,9 @@ class WalletBackupTest(BitcoinTestFramework):
         self.stop_node(2)
 
     def erase_three(self):
-        os.remove(os.path.join(self.nodes[0].datadir, 'regtest', 'wallets', 'wallet.dat'))
-        os.remove(os.path.join(self.nodes[1].datadir, 'regtest', 'wallets', 'wallet.dat'))
-        os.remove(os.path.join(self.nodes[2].datadir, 'regtest', 'wallets', 'wallet.dat'))
+        os.remove(os.path.join(self.nodes[0].datadir, self.chain, 'wallets', 'wallet.dat'))
+        os.remove(os.path.join(self.nodes[1].datadir, self.chain, 'wallets', 'wallet.dat'))
+        os.remove(os.path.join(self.nodes[2].datadir, self.chain, 'wallets', 'wallet.dat'))
 
     def run_test(self):
         self.log.info("Generating initial blockchain")
@@ -152,13 +152,13 @@ class WalletBackupTest(BitcoinTestFramework):
         self.erase_three()
 
         # Start node2 with no chain
-        shutil.rmtree(os.path.join(self.nodes[2].datadir, 'regtest', 'blocks'))
-        shutil.rmtree(os.path.join(self.nodes[2].datadir, 'regtest', 'chainstate'))
+        shutil.rmtree(os.path.join(self.nodes[2].datadir, self.chain, 'blocks'))
+        shutil.rmtree(os.path.join(self.nodes[2].datadir, self.chain, 'chainstate'))
 
         # Restore wallets from backup
-        shutil.copyfile(os.path.join(self.nodes[0].datadir, 'wallet.bak'), os.path.join(self.nodes[0].datadir, 'regtest', 'wallets', 'wallet.dat'))
-        shutil.copyfile(os.path.join(self.nodes[1].datadir, 'wallet.bak'), os.path.join(self.nodes[1].datadir, 'regtest', 'wallets', 'wallet.dat'))
-        shutil.copyfile(os.path.join(self.nodes[2].datadir, 'wallet.bak'), os.path.join(self.nodes[2].datadir, 'regtest', 'wallets', 'wallet.dat'))
+        shutil.copyfile(os.path.join(self.nodes[0].datadir, 'wallet.bak'), os.path.join(self.nodes[0].datadir, self.chain, 'wallets', 'wallet.dat'))
+        shutil.copyfile(os.path.join(self.nodes[1].datadir, 'wallet.bak'), os.path.join(self.nodes[1].datadir, self.chain, 'wallets', 'wallet.dat'))
+        shutil.copyfile(os.path.join(self.nodes[2].datadir, 'wallet.bak'), os.path.join(self.nodes[2].datadir, self.chain, 'wallets', 'wallet.dat'))
 
         self.log.info("Re-starting nodes")
         self.start_three()
@@ -173,8 +173,8 @@ class WalletBackupTest(BitcoinTestFramework):
         self.erase_three()
 
         #start node2 with no chain
-        shutil.rmtree(os.path.join(self.nodes[2].datadir, 'regtest', 'blocks'))
-        shutil.rmtree(os.path.join(self.nodes[2].datadir, 'regtest', 'chainstate'))
+        shutil.rmtree(os.path.join(self.nodes[2].datadir, self.chain, 'blocks'))
+        shutil.rmtree(os.path.join(self.nodes[2].datadir, self.chain, 'chainstate'))
 
         self.start_three()
 
@@ -194,10 +194,10 @@ class WalletBackupTest(BitcoinTestFramework):
 
         # Backup to source wallet file must fail
         sourcePaths = [
-            os.path.join(self.nodes[0].datadir, 'regtest', 'wallets', 'wallet.dat'),
-            os.path.join(self.nodes[0].datadir, 'regtest', '.', 'wallets', 'wallet.dat'),
-            os.path.join(self.nodes[0].datadir, 'regtest', 'wallets', ''),
-            os.path.join(self.nodes[0].datadir, 'regtest', 'wallets')]
+            os.path.join(self.nodes[0].datadir, self.chain, 'wallets', 'wallet.dat'),
+            os.path.join(self.nodes[0].datadir, self.chain, '.', 'wallets', 'wallet.dat'),
+            os.path.join(self.nodes[0].datadir, self.chain, 'wallets', ''),
+            os.path.join(self.nodes[0].datadir, self.chain, 'wallets')]
 
         for sourcePath in sourcePaths:
             assert_raises_rpc_error(-4, "backup failed", self.nodes[0].backupwallet, sourcePath)
diff --git a/test/functional/wallet_hd.py b/test/functional/wallet_hd.py
index 2a5f1934b7..9a03cc3d17 100755
--- a/test/functional/wallet_hd.py
+++ b/test/functional/wallet_hd.py
@@ -72,11 +72,11 @@ class WalletHDTest(BitcoinTestFramework):
 
         self.log.info("Restore backup ...")
         self.stop_node(1)
-        # we need to delete the complete regtest directory
+        # we need to delete the complete chain directory
         # otherwise node1 would auto-recover all funds in flag the keypool keys as used
-        shutil.rmtree(os.path.join(self.nodes[1].datadir, "regtest", "blocks"))
-        shutil.rmtree(os.path.join(self.nodes[1].datadir, "regtest", "chainstate"))
-        shutil.copyfile(os.path.join(self.nodes[1].datadir, "hd.bak"), os.path.join(self.nodes[1].datadir, "regtest", "wallets", "wallet.dat"))
+        shutil.rmtree(os.path.join(self.nodes[1].datadir, self.chain, "blocks"))
+        shutil.rmtree(os.path.join(self.nodes[1].datadir, self.chain, "chainstate"))
+        shutil.copyfile(os.path.join(self.nodes[1].datadir, "hd.bak"), os.path.join(self.nodes[1].datadir, self.chain, "wallets", "wallet.dat"))
         self.start_node(1)
 
         # Assert that derivation is deterministic
@@ -98,9 +98,9 @@ class WalletHDTest(BitcoinTestFramework):
 
         # Try a RPC based rescan
         self.stop_node(1)
-        shutil.rmtree(os.path.join(self.nodes[1].datadir, "regtest", "blocks"))
-        shutil.rmtree(os.path.join(self.nodes[1].datadir, "regtest", "chainstate"))
-        shutil.copyfile(os.path.join(self.nodes[1].datadir, "hd.bak"), os.path.join(self.nodes[1].datadir, "regtest", "wallets", "wallet.dat"))
+        shutil.rmtree(os.path.join(self.nodes[1].datadir, self.chain, "blocks"))
+        shutil.rmtree(os.path.join(self.nodes[1].datadir, self.chain, "chainstate"))
+        shutil.copyfile(os.path.join(self.nodes[1].datadir, "hd.bak"), os.path.join(self.nodes[1].datadir, self.chain, "wallets", "wallet.dat"))
         self.start_node(1, extra_args=self.extra_args[1])
         connect_nodes_bi(self.nodes, 0, 1)
         self.sync_all()
diff --git a/test/functional/wallet_keypool_topup.py b/test/functional/wallet_keypool_topup.py
index f6b88e6225..a05c0193c9 100755
--- a/test/functional/wallet_keypool_topup.py
+++ b/test/functional/wallet_keypool_topup.py
@@ -28,7 +28,7 @@ class KeypoolRestoreTest(BitcoinTestFramework):
         self.extra_args = [[], ['-keypool=100']]
 
     def run_test(self):
-        wallet_path = os.path.join(self.nodes[1].datadir, "regtest", "wallets", "wallet.dat")
+        wallet_path = os.path.join(self.nodes[1].datadir, self.chain, "wallets", "wallet.dat")
         wallet_backup_path = os.path.join(self.nodes[1].datadir, "wallet.bak")
         self.nodes[0].generate(101)
 
diff --git a/test/functional/wallet_multiwallet.py b/test/functional/wallet_multiwallet.py
index 0690dcf92d..0ac42e5d7f 100755
--- a/test/functional/wallet_multiwallet.py
+++ b/test/functional/wallet_multiwallet.py
@@ -26,7 +26,7 @@ class MultiWalletTest(BitcoinTestFramework):
     def run_test(self):
         node = self.nodes[0]
 
-        data_dir = lambda *p: os.path.join(node.datadir, 'regtest', *p)
+        data_dir = lambda *p: os.path.join(node.datadir, self.chain, *p)
         wallet_dir = lambda *p: data_dir('wallets', *p)
         wallet = lambda name: node.get_wallet_rpc(name)
 
@@ -168,7 +168,7 @@ class MultiWalletTest(BitcoinTestFramework):
         assert_equal(w4.getbalance(), 3)
 
         batch = w1.batch([w1.getblockchaininfo.get_request(), w1.getwalletinfo.get_request()])
-        assert_equal(batch[0]["result"]["chain"], "regtest")
+        assert_equal(batch[0]["result"]["chain"], self.chain)
         assert_equal(batch[1]["result"]["walletname"], "w1")
 
         self.log.info('Check for per-wallet settxfee call')