diff --git a/test/functional/rpc_bind.py b/test/functional/rpc_bind.py
--- a/test/functional/rpc_bind.py
+++ b/test/functional/rpc_bind.py
@@ -4,10 +4,15 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test running bitcoind with the -rpcbind and -rpcallowip options."""
 
-from platform import uname
 import sys
+from platform import uname
 
-from test_framework.netutil import addr_to_hex, all_interfaces, get_bind_addrs, test_ipv6_local
+from test_framework.netutil import (
+    addr_to_hex,
+    all_interfaces,
+    get_bind_addrs,
+    test_ipv6_local,
+)
 from test_framework.test_framework import BitcoinTestFramework, SkipTest
 from test_framework.util import (
     assert_equal,
diff --git a/test/functional/rpc_blockchain.py b/test/functional/rpc_blockchain.py
--- a/test/functional/rpc_blockchain.py
+++ b/test/functional/rpc_blockchain.py
@@ -19,30 +19,26 @@
 Tests correspond to code in rpc/blockchain.cpp.
 """
 
-from decimal import Decimal
 import http.client
 import subprocess
+from decimal import Decimal
 
 from test_framework.blocktools import (
+    TIME_GENESIS_BLOCK,
     create_block,
     create_coinbase,
-    TIME_GENESIS_BLOCK,
-)
-from test_framework.messages import (
-    CBlockHeader,
-    FromHex,
-    msg_block,
 )
+from test_framework.messages import CBlockHeader, FromHex, msg_block
 from test_framework.p2p import P2PInterface
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     assert_greater_than,
     assert_greater_than_or_equal,
+    assert_is_hash_string,
+    assert_is_hex_string,
     assert_raises,
     assert_raises_rpc_error,
-    assert_is_hex_string,
-    assert_is_hash_string,
 )
 
 
diff --git a/test/functional/rpc_createmultisig.py b/test/functional/rpc_createmultisig.py
--- a/test/functional/rpc_createmultisig.py
+++ b/test/functional/rpc_createmultisig.py
@@ -12,10 +12,7 @@
 from test_framework.descriptors import descsum_create, drop_origins
 from test_framework.key import ECPubKey
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_raises_rpc_error,
-    assert_equal,
-)
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class RpcCreateMultiSigTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_deriveaddresses.py b/test/functional/rpc_deriveaddresses.py
--- a/test/functional/rpc_deriveaddresses.py
+++ b/test/functional/rpc_deriveaddresses.py
@@ -3,8 +3,8 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test the deriveaddresses rpc call."""
-from test_framework.test_framework import BitcoinTestFramework
 from test_framework.descriptors import descsum_create
+from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
diff --git a/test/functional/rpc_dumptxoutset.py b/test/functional/rpc_dumptxoutset.py
--- a/test/functional/rpc_dumptxoutset.py
+++ b/test/functional/rpc_dumptxoutset.py
@@ -4,12 +4,12 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test the generation of UTXO snapshots using `dumptxoutset`.
 """
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, assert_raises_rpc_error
-
 import hashlib
 from pathlib import Path
 
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, assert_raises_rpc_error
+
 
 class DumptxoutsetTest(BitcoinTestFramework):
     def set_test_params(self):
diff --git a/test/functional/rpc_generate.py b/test/functional/rpc_generate.py
--- a/test/functional/rpc_generate.py
+++ b/test/functional/rpc_generate.py
@@ -5,10 +5,7 @@
 """Test generate RPC."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    assert_raises_rpc_error,
-)
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class RPCGenerateTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_generateblock.py b/test/functional/rpc_generateblock.py
--- a/test/functional/rpc_generateblock.py
+++ b/test/functional/rpc_generateblock.py
@@ -6,10 +6,7 @@
 '''
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    assert_raises_rpc_error,
-)
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class GenerateBlockTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_getblockfilter.py b/test/functional/rpc_getblockfilter.py
--- a/test/functional/rpc_getblockfilter.py
+++ b/test/functional/rpc_getblockfilter.py
@@ -6,8 +6,11 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    assert_equal, assert_is_hex_string, assert_raises_rpc_error,
-    connect_nodes, disconnect_nodes
+    assert_equal,
+    assert_is_hex_string,
+    assert_raises_rpc_error,
+    connect_nodes,
+    disconnect_nodes,
 )
 
 FILTER_TYPES = ["basic"]
diff --git a/test/functional/rpc_getblockstats.py b/test/functional/rpc_getblockstats.py
--- a/test/functional/rpc_getblockstats.py
+++ b/test/functional/rpc_getblockstats.py
@@ -11,10 +11,7 @@
 import os
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    assert_raises_rpc_error,
-)
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 TESTSDIR = os.path.dirname(os.path.realpath(__file__))
 
diff --git a/test/functional/rpc_getdescriptorinfo.py b/test/functional/rpc_getdescriptorinfo.py
--- a/test/functional/rpc_getdescriptorinfo.py
+++ b/test/functional/rpc_getdescriptorinfo.py
@@ -5,12 +5,9 @@
 """Test getdescriptorinfo RPC.
 """
 
-from test_framework.test_framework import BitcoinTestFramework
 from test_framework.descriptors import descsum_create
-from test_framework.util import (
-    assert_equal,
-    assert_raises_rpc_error,
-)
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class DescriptorTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_help.py b/test/functional/rpc_help.py
--- a/test/functional/rpc_help.py
+++ b/test/functional/rpc_help.py
@@ -4,11 +4,11 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test RPC help output."""
 
+import os
+
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, assert_raises_rpc_error
 
-import os
-
 
 class HelpRpcTest(BitcoinTestFramework):
     def set_test_params(self):
diff --git a/test/functional/rpc_invalidateblock.py b/test/functional/rpc_invalidateblock.py
--- a/test/functional/rpc_invalidateblock.py
+++ b/test/functional/rpc_invalidateblock.py
@@ -6,10 +6,7 @@
 
 from test_framework.address import ADDRESS_ECREG_UNSPENDABLE_DESCRIPTOR
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    connect_nodes,
-)
+from test_framework.util import assert_equal, connect_nodes
 
 
 class InvalidateTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_misc.py b/test/functional/rpc_misc.py
--- a/test/functional/rpc_misc.py
+++ b/test/functional/rpc_misc.py
@@ -5,16 +5,15 @@
 """Test RPC misc output."""
 import xml.etree.ElementTree as ET
 
+from test_framework.authproxy import JSONRPCException
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    assert_raises_rpc_error,
     assert_equal,
     assert_greater_than,
     assert_greater_than_or_equal,
+    assert_raises_rpc_error,
 )
 
-from test_framework.authproxy import JSONRPCException
-
 
 class RpcMiscTest(BitcoinTestFramework):
     def set_test_params(self):
diff --git a/test/functional/rpc_net.py b/test/functional/rpc_net.py
--- a/test/functional/rpc_net.py
+++ b/test/functional/rpc_net.py
@@ -7,21 +7,21 @@
 Tests correspond to code in rpc/net.cpp.
 """
 
+import time
 from decimal import Decimal
 from itertools import product
-import time
 
+import test_framework.messages
 from test_framework.avatools import create_coinbase_stakes
 from test_framework.key import ECKey
-from test_framework.p2p import P2PInterface
-import test_framework.messages
 from test_framework.messages import NODE_NETWORK
+from test_framework.p2p import P2PInterface
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_approx,
     assert_equal,
-    assert_greater_than_or_equal,
     assert_greater_than,
+    assert_greater_than_or_equal,
     assert_raises_rpc_error,
     connect_nodes,
     p2p_port,
diff --git a/test/functional/rpc_preciousblock.py b/test/functional/rpc_preciousblock.py
--- a/test/functional/rpc_preciousblock.py
+++ b/test/functional/rpc_preciousblock.py
@@ -5,10 +5,7 @@
 """Test the preciousblock RPC."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    connect_nodes,
-)
+from test_framework.util import assert_equal, connect_nodes
 
 
 def unidirectional_node_sync_via_rpc(node_src, node_dest):
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -7,8 +7,8 @@
 
 import json
 import os
-
 from decimal import Decimal
+
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_approx,
diff --git a/test/functional/rpc_rawtransaction.py b/test/functional/rpc_rawtransaction.py
--- a/test/functional/rpc_rawtransaction.py
+++ b/test/functional/rpc_rawtransaction.py
@@ -12,10 +12,10 @@
    - getrawtransaction
 """
 
-from decimal import Decimal
-
 from collections import OrderedDict
+from decimal import Decimal
 from io import BytesIO
+
 from test_framework.messages import (
     COutPoint,
     CTransaction,
diff --git a/test/functional/rpc_setban.py b/test/functional/rpc_setban.py
--- a/test/functional/rpc_setban.py
+++ b/test/functional/rpc_setban.py
@@ -5,10 +5,7 @@
 """Test the setban rpc call."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    connect_nodes,
-    p2p_port
-)
+from test_framework.util import connect_nodes, p2p_port
 
 
 class SetBanTests(BitcoinTestFramework):
diff --git a/test/functional/rpc_txoutproof.py b/test/functional/rpc_txoutproof.py
--- a/test/functional/rpc_txoutproof.py
+++ b/test/functional/rpc_txoutproof.py
@@ -4,13 +4,13 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test gettxoutproof and verifytxoutproof RPCs."""
 
+from test_framework.messages import CMerkleBlock, FromHex, ToHex
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     assert_raises_rpc_error,
     connect_nodes,
 )
-from test_framework.messages import CMerkleBlock, FromHex, ToHex
 
 
 class MerkleBlockTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_users.py b/test/functional/rpc_users.py
--- a/test/functional/rpc_users.py
+++ b/test/functional/rpc_users.py
@@ -7,18 +7,14 @@
 import configparser
 import http.client
 import os
-from random import SystemRandom
 import string
 import subprocess
 import sys
 import urllib.parse
+from random import SystemRandom
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import (
-    assert_equal,
-    get_datadir_path,
-    str_to_b64str,
-)
+from test_framework.util import assert_equal, get_datadir_path, str_to_b64str
 
 
 def call_with_auth(node, user, password):
diff --git a/test/functional/rpc_whitelist.py b/test/functional/rpc_whitelist.py
--- a/test/functional/rpc_whitelist.py
+++ b/test/functional/rpc_whitelist.py
@@ -5,16 +5,13 @@
 """
 A test for RPC users with restricted permissions
 """
-from test_framework.test_framework import BitcoinTestFramework
-import os
-from test_framework.util import (
-    get_datadir_path,
-    assert_equal,
-    str_to_b64str
-)
 import http.client
+import os
 import urllib.parse
 
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, get_datadir_path, str_to_b64str
+
 
 def rpccall(node, user, method):
     url = urllib.parse.urlparse(node.url)