diff --git a/cmake/utils/gen-ninja-deps.py b/cmake/utils/gen-ninja-deps.py
--- a/cmake/utils/gen-ninja-deps.py
+++ b/cmake/utils/gen-ninja-deps.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 
-import subprocess
-import os
 import argparse
+import os
+import subprocess
 
 parser = argparse.ArgumentParser(description='Produce a dep file from ninja.')
 parser.add_argument(
diff --git a/share/qt/extract_strings_qt.py b/share/qt/extract_strings_qt.py
--- a/share/qt/extract_strings_qt.py
+++ b/share/qt/extract_strings_qt.py
@@ -6,10 +6,10 @@
 Extract _("...") strings for translation and convert to Qt stringdefs so that
 they can be picked up by Qt linguist.
 '''
-from subprocess import Popen, PIPE
 import operator
 import os
 import sys
+from subprocess import PIPE, Popen
 
 OUT_CPP = "qt/bitcoinstrings.cpp"
 EMPTY = ['""']
diff --git a/share/rpcauth/rpcauth.py b/share/rpcauth/rpcauth.py
--- a/share/rpcauth/rpcauth.py
+++ b/share/rpcauth/rpcauth.py
@@ -3,14 +3,13 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+import hmac
 from argparse import ArgumentParser
 from base64 import urlsafe_b64encode
 from binascii import hexlify
 from getpass import getpass
 from os import urandom
 
-import hmac
-
 
 def generate_salt(size):
     """Create size byte hex salt"""
diff --git a/src/test/data/generate_asmap.py b/src/test/data/generate_asmap.py
--- a/src/test/data/generate_asmap.py
+++ b/src/test/data/generate_asmap.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python3
 # Copyright (c) 2020 The Bitcoin developers
 
-from pathlib import Path
 import sys
+from pathlib import Path
 
 
 def main(input_file, output_file):
diff --git a/test/functional/combine_logs.py b/test/functional/combine_logs.py
--- a/test/functional/combine_logs.py
+++ b/test/functional/combine_logs.py
@@ -10,7 +10,6 @@
 If no argument is provided, the most recent test directory will be used."""
 
 import argparse
-from collections import defaultdict, namedtuple
 import heapq
 import itertools
 import os
@@ -18,6 +17,7 @@
 import re
 import sys
 import tempfile
+from collections import defaultdict, namedtuple
 
 # N.B.: don't import any local modules here - this script must remain executable
 # without the parent module installed.
diff --git a/test/functional/data/invalid_txs.py b/test/functional/data/invalid_txs.py
--- a/test/functional/data/invalid_txs.py
+++ b/test/functional/data/invalid_txs.py
@@ -20,29 +20,27 @@
 
 """
 import abc
-
 from typing import Optional
+
+from test_framework import script as sc
+from test_framework.blocktools import create_tx_with_script
 from test_framework.messages import (
+    MAX_MONEY,
     COutPoint,
     CTransaction,
     CTxIn,
     CTxOut,
-    MAX_MONEY,
 )
-from test_framework import script as sc
-from test_framework.blocktools import create_tx_with_script
-from test_framework.txtools import pad_tx
-
-
 from test_framework.script import (
-    CScript,
-    OP_INVERT,
-    OP_2MUL,
     OP_2DIV,
-    OP_MUL,
+    OP_2MUL,
+    OP_INVERT,
     OP_LSHIFT,
-    OP_RSHIFT
+    OP_MUL,
+    OP_RSHIFT,
+    CScript,
 )
+from test_framework.txtools import pad_tx
 
 basic_p2sh = sc.CScript(
     [sc.OP_HASH160, sc.hash160(sc.CScript([sc.OP_0])), sc.OP_EQUAL])
diff --git a/test/functional/example_test.py b/test/functional/example_test.py
--- a/test/functional/example_test.py
+++ b/test/functional/example_test.py
@@ -14,22 +14,11 @@
 from collections import defaultdict
 
 # Avoid wildcard * imports if possible
-from test_framework.blocktools import (create_block, create_coinbase)
-from test_framework.messages import (
-    CInv,
-    MSG_BLOCK,
-    msg_block,
-    msg_getdata
-)
-from test_framework.p2p import (
-    P2PInterface,
-    p2p_lock,
-)
+from test_framework.blocktools import create_block, create_coinbase
+from test_framework.messages import MSG_BLOCK, CInv, msg_block, msg_getdata
+from test_framework.p2p import P2PInterface, p2p_lock
 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
 
 # P2PInterface is a class containing callbacks to be executed when a P2P
 # message is received from the node-under-test. Subclass P2PInterface and
diff --git a/test/functional/test_framework/address.py b/test/functional/test_framework/address.py
--- a/test/functional/test_framework/address.py
+++ b/test/functional/test_framework/address.py
@@ -7,7 +7,7 @@
 import unittest
 
 from .script import CScript, hash160, hash256
-from .util import hex_str_to_bytes, assert_equal
+from .util import assert_equal, hex_str_to_bytes
 
 ADDRESS_ECREG_UNSPENDABLE = 'ecregtest:qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqcrl5mqkt'
 ADDRESS_ECREG_UNSPENDABLE_DESCRIPTOR = 'addr(ecregtest:qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqcrl5mqkt)#u6xx93xc'
diff --git a/test/functional/test_framework/authproxy.py b/test/functional/test_framework/authproxy.py
--- a/test/functional/test_framework/authproxy.py
+++ b/test/functional/test_framework/authproxy.py
@@ -36,7 +36,6 @@
 
 import base64
 import decimal
-from http import HTTPStatus
 import http.client
 import json
 import logging
@@ -44,6 +43,7 @@
 import socket
 import time
 import urllib.parse
+from http import HTTPStatus
 
 HTTP_TIMEOUT = 30
 USER_AGENT = "AuthServiceProxy/0.1"
diff --git a/test/functional/test_framework/avatools.py b/test/functional/test_framework/avatools.py
--- a/test/functional/test_framework/avatools.py
+++ b/test/functional/test_framework/avatools.py
@@ -5,33 +5,29 @@
 """Utilities for avalanche tests."""
 
 import struct
-from typing import Any, Optional, List, Dict
+from typing import Any, Dict, List, Optional
 
 from .authproxy import JSONRPCException
 from .key import ECKey
 from .messages import (
+    NODE_AVALANCHE,
+    NODE_NETWORK,
     AvalancheDelegation,
     AvalancheProof,
     AvalancheResponse,
     CInv,
     CTransaction,
     FromHex,
+    TCPAvalancheResponse,
+    ToHex,
     hash256,
     msg_avahello,
     msg_avapoll,
     msg_tcpavaresponse,
-    NODE_AVALANCHE,
-    NODE_NETWORK,
-    TCPAvalancheResponse,
-    ToHex,
 )
 from .p2p import P2PInterface, p2p_lock
 from .test_node import TestNode
-from .util import (
-    assert_equal,
-    satoshi_round,
-    wait_until_helper,
-)
+from .util import assert_equal, satoshi_round, wait_until_helper
 from .wallet_util import bytes_to_wif
 
 
diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -6,22 +6,10 @@
 
 import unittest
 
-from .script import (
-    CScript,
-    CScriptNum,
-    CScriptOp,
-    OP_1,
-    OP_CHECKSIG,
-    OP_DUP,
-    OP_EQUALVERIFY,
-    OP_HASH160,
-    OP_RETURN,
-    OP_TRUE,
-)
 from .messages import (
-    CBlock,
     COIN,
     XEC,
+    CBlock,
     COutPoint,
     CTransaction,
     CTxIn,
@@ -29,6 +17,18 @@
     FromHex,
     ToHex,
 )
+from .script import (
+    OP_1,
+    OP_CHECKSIG,
+    OP_DUP,
+    OP_EQUALVERIFY,
+    OP_HASH160,
+    OP_RETURN,
+    OP_TRUE,
+    CScript,
+    CScriptNum,
+    CScriptOp,
+)
 from .txtools import pad_tx
 from .util import assert_equal, satoshi_round
 
diff --git a/test/functional/test_framework/coverage.py b/test/functional/test_framework/coverage.py
--- a/test/functional/test_framework/coverage.py
+++ b/test/functional/test_framework/coverage.py
@@ -10,7 +10,6 @@
 
 import os
 
-
 REFERENCE_FILENAME = 'rpc_interface.txt'
 
 
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -18,21 +18,19 @@
 Classes use __slots__ to ensure extraneous attributes aren't accidentally added
 by tests, compromising their intended effect.
 """
-from codecs import encode
 import copy
 import hashlib
-from io import BytesIO
 import random
 import socket
 import struct
 import time
 import unittest
-
+from codecs import encode
+from io import BytesIO
 from typing import List
 
 from test_framework.siphash import siphash256
-from test_framework.util import hex_str_to_bytes, assert_equal
-
+from test_framework.util import assert_equal, hex_str_to_bytes
 
 MIN_VERSION_SUPPORTED = 60001
 # past bip-31 for ping/pong
diff --git a/test/functional/test_framework/netutil.py b/test/functional/test_framework/netutil.py
--- a/test/functional/test_framework/netutil.py
+++ b/test/functional/test_framework/netutil.py
@@ -8,12 +8,12 @@
 """
 
 import array
-from binascii import unhexlify
-from errno import ENOENT, EINVAL
 import os
 import socket
 import struct
 import sys
+from binascii import unhexlify
+from errno import EINVAL, ENOENT
 
 # STATE_ESTABLISHED = '01'
 # STATE_SYN_SENT = '02'
@@ -171,6 +171,7 @@
     Check for (local) IPv6 support.
     '''
     import socket
+
     # By using SOCK_DGRAM this will not actually make a connection, but it will
     # fail if there is no route to IPv6 localhost.
     have_ipv6 = True
diff --git a/test/functional/test_framework/p2p.py b/test/functional/test_framework/p2p.py
--- a/test/functional/test_framework/p2p.py
+++ b/test/functional/test_framework/p2p.py
@@ -21,25 +21,27 @@
               a count of how many times each txid has been announced."""
 
 import asyncio
-from collections import defaultdict
-from io import BytesIO
 import logging
 import struct
 import sys
 import threading
+from collections import defaultdict
+from io import BytesIO
 
 from test_framework.messages import (
-    CBlockHeader,
     MAX_HEADERS_RESULTS,
     MIN_VERSION_SUPPORTED,
+    MSG_BLOCK,
+    MSG_TX,
+    MSG_TYPE_MASK,
+    NODE_NETWORK,
+    CBlockHeader,
     msg_addr,
     msg_addrv2,
+    msg_avahello,
     msg_avapoll,
     msg_avaproof,
-    msg_tcpavaresponse,
-    msg_avahello,
     msg_block,
-    MSG_BLOCK,
     msg_blocktxn,
     msg_cfcheckpt,
     msg_cfheaders,
@@ -64,12 +66,10 @@
     msg_sendaddrv2,
     msg_sendcmpct,
     msg_sendheaders,
+    msg_tcpavaresponse,
     msg_tx,
-    MSG_TX,
-    MSG_TYPE_MASK,
     msg_verack,
     msg_version,
-    NODE_NETWORK,
     sha256,
 )
 from test_framework.util import wait_until_helper
diff --git a/test/functional/test_framework/script.py b/test/functional/test_framework/script.py
--- a/test/functional/test_framework/script.py
+++ b/test/functional/test_framework/script.py
@@ -10,7 +10,7 @@
 import hashlib
 import struct
 import unittest
-from typing import List, Dict
+from typing import Dict, List
 
 from .messages import (
     CTransaction,
@@ -22,7 +22,6 @@
     uint256_from_str,
 )
 
-
 MAX_SCRIPT_ELEMENT_SIZE = 520
 OPCODE_NAMES: Dict["CScriptOp", str] = {}
 
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -6,7 +6,6 @@
 
 import argparse
 import configparser
-from enum import Enum
 import logging
 import os
 import pdb
@@ -15,23 +14,24 @@
 import sys
 import tempfile
 import time
+from enum import Enum
 from typing import Optional
 
+from . import coverage
 from .authproxy import JSONRPCException
 from .avatools import get_proof_ids
-from . import coverage
 from .p2p import NetworkThread
 from .test_node import TestNode
 from .util import (
+    MAX_NODES,
+    PortSeed,
     assert_equal,
     check_json_precision,
     connect_nodes,
     disconnect_nodes,
     get_datadir_path,
     initialize_datadir,
-    MAX_NODES,
     p2p_port,
-    PortSeed,
     rpc_port,
     wait_until_helper,
 )
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -4,28 +4,29 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Class for bitcoind node under test"""
 
+import collections
 import contextlib
 import decimal
-from enum import Enum
 import errno
 import http.client
 import json
 import logging
 import os
 import re
+import shlex
 import subprocess
 import sys
 import tempfile
 import time
 import urllib.parse
-import collections
-import shlex
+from enum import Enum
 
 from .authproxy import JSONRPCException
 from .descriptors import descsum_create
-from .messages import XEC, CTransaction, FromHex, MY_SUBVERSION
+from .messages import MY_SUBVERSION, XEC, CTransaction, FromHex
 from .util import (
     MAX_NODES,
+    EncodeDecimal,
     append_config,
     delete_cookie_file,
     get_auth_cookie,
@@ -33,7 +34,6 @@
     p2p_port,
     rpc_url,
     wait_until_helper,
-    EncodeDecimal,
 )
 
 BITCOIND_PROC_WAIT_TIMEOUT = 60
diff --git a/test/functional/test_framework/txtools.py b/test/functional/test_framework/txtools.py
--- a/test/functional/test_framework/txtools.py
+++ b/test/functional/test_framework/txtools.py
@@ -3,7 +3,7 @@
 
 from .cdefs import MAX_TXOUT_PUBKEY_SCRIPT, MIN_TX_SIZE
 from .messages import CTransaction, CTxOut, FromHex, ToHex
-from .script import CScript, OP_RETURN
+from .script import OP_RETURN, CScript
 
 
 def pad_tx(tx, pad_to_size=MIN_TX_SIZE):
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -4,11 +4,6 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Helpful routines for regression testing."""
 
-from base64 import b64encode
-from binascii import unhexlify
-from decimal import Decimal, ROUND_DOWN
-from io import BytesIO
-from subprocess import CalledProcessError
 import inspect
 import json
 import logging
@@ -17,6 +12,11 @@
 import re
 import time
 import unittest
+from base64 import b64encode
+from binascii import unhexlify
+from decimal import ROUND_DOWN, Decimal
+from io import BytesIO
+from subprocess import CalledProcessError
 
 from . import coverage
 from .authproxy import AuthServiceProxy, JSONRPCException
diff --git a/test/functional/test_framework/wallet_util.py b/test/functional/test_framework/wallet_util.py
--- a/test/functional/test_framework/wallet_util.py
+++ b/test/functional/test_framework/wallet_util.py
@@ -5,14 +5,9 @@
 """Useful util functions for testing the wallet"""
 from collections import namedtuple
 
-from test_framework.address import (
-    byte_to_base58,
-    key_to_p2pkh,
-    script_to_p2sh,
-)
+from test_framework.address import byte_to_base58, key_to_p2pkh, script_to_p2sh
 from test_framework.key import ECKey
 from test_framework.script import (
-    CScript,
     OP_2,
     OP_3,
     OP_CHECKMULTISIG,
@@ -21,6 +16,7 @@
     OP_EQUAL,
     OP_EQUALVERIFY,
     OP_HASH160,
+    CScript,
     hash160,
 )
 from test_framework.util import hex_str_to_bytes
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -14,23 +14,23 @@
 """
 
 import argparse
-from collections import deque
 import configparser
 import datetime
+import json
+import logging
+import multiprocessing
 import os
-import time
+import re
 import shutil
-import sys
 import subprocess
+import sys
 import tempfile
-import re
-import logging
-import xml.etree.ElementTree as ET
-import json
 import threading
-import multiprocessing
-from queue import Queue, Empty
+import time
 import unittest
+import xml.etree.ElementTree as ET
+from collections import deque
+from queue import Empty, Queue
 
 # Formatting. Default colors to empty strings.
 BOLD, GREEN, RED, GREY = ("", ""), ("", ""), ("", ""), ("", "")
diff --git a/test/fuzz/test_runner.py b/test/fuzz/test_runner.py
--- a/test/fuzz/test_runner.py
+++ b/test/fuzz/test_runner.py
@@ -6,12 +6,12 @@
 """
 
 import argparse
-from concurrent.futures import ThreadPoolExecutor, as_completed
 import configparser
 import logging
 import os
 import subprocess
 import sys
+from concurrent.futures import ThreadPoolExecutor, as_completed
 
 
 def main():
diff --git a/test/lint/check-doc.py b/test/lint/check-doc.py
--- a/test/lint/check-doc.py
+++ b/test/lint/check-doc.py
@@ -11,10 +11,10 @@
 Author: @MarcoFalke
 '''
 
-from subprocess import check_output
-from pprint import PrettyPrinter
 import glob
 import re
+from pprint import PrettyPrinter
+from subprocess import check_output
 
 TOP_LEVEL = 'git rev-parse --show-toplevel'
 FOLDER_SRC = '/src/**/'
diff --git a/test/lint/check-rpc-mappings.py b/test/lint/check-rpc-mappings.py
--- a/test/lint/check-rpc-mappings.py
+++ b/test/lint/check-rpc-mappings.py
@@ -4,11 +4,11 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Check RPC argument consistency."""
 
-from collections import defaultdict
 import glob
 import os
 import re
 import sys
+from collections import defaultdict
 
 # Source files (relative to root) to scan for dispatch tables
 SOURCE_PATTERNS = [