diff --git a/test/functional/abc-cmdline.py b/test/functional/abc-cmdline.py
--- a/test/functional/abc-cmdline.py
+++ b/test/functional/abc-cmdline.py
@@ -12,7 +12,7 @@
 import re
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
-from test_framework.cdefs import LEGACY_MAX_BLOCK_SIZE, DEFAULT_MAX_BLOCK_SIZE
+from test_framework.cdefs import LEGACY_MAX_BLOCK_SIZE
 
 MAX_GENERATED_BLOCK_SIZE_ERROR = (
     'Max generated block size (blockmaxsize) cannot exceed the excessive block size (excessiveblocksize)')
diff --git a/test/functional/abc-finalize-block.py b/test/functional/abc-finalize-block.py
--- a/test/functional/abc-finalize-block.py
+++ b/test/functional/abc-finalize-block.py
@@ -3,11 +3,10 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test the finalizeblock RPC calls."""
-import os
 import time
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, assert_raises_rpc_error, connect_nodes_bi, wait_until, set_node_times
+from test_framework.util import assert_equal, assert_raises_rpc_error, wait_until, set_node_times
 
 RPC_FINALIZE_INVALID_BLOCK_ERROR = 'finalize-invalid-block'
 RPC_FORK_PRIOR_FINALIZED_ERROR = 'bad-fork-prior-finalized'
diff --git a/test/functional/abc-high_priority_transaction.py b/test/functional/abc-high_priority_transaction.py
--- a/test/functional/abc-high_priority_transaction.py
+++ b/test/functional/abc-high_priority_transaction.py
@@ -10,7 +10,6 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import *
 from test_framework.mininode import COIN
-from test_framework.cdefs import LEGACY_MAX_BLOCK_SIZE, COINBASE_MATURITY
 from test_framework.blocktools import create_confirmed_utxos
 
 
diff --git a/test/functional/abc-magnetic-anomaly-mining.py b/test/functional/abc-magnetic-anomaly-mining.py
--- a/test/functional/abc-magnetic-anomaly-mining.py
+++ b/test/functional/abc-magnetic-anomaly-mining.py
@@ -11,9 +11,7 @@
 import random
 import decimal
 
-from test_framework.blocktools import create_coinbase
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 
 
 class CTORMiningTest(BitcoinTestFramework):
diff --git a/test/functional/abc-mempool-accept-txn.py b/test/functional/abc-mempool-accept-txn.py
--- a/test/functional/abc-mempool-accept-txn.py
+++ b/test/functional/abc-mempool-accept-txn.py
@@ -15,7 +15,6 @@
 import time
 from test_framework.key import CECKey
 from test_framework.script import *
-import struct
 from test_framework.cdefs import MAX_STANDARD_TX_SIGOPS
 
 # Error for too many sigops in one TX
diff --git a/test/functional/abc-p2p-compactblocks.py b/test/functional/abc-p2p-compactblocks.py
--- a/test/functional/abc-p2p-compactblocks.py
+++ b/test/functional/abc-p2p-compactblocks.py
@@ -13,12 +13,11 @@
 
 from test_framework.test_framework import ComparisonTestFramework
 from test_framework.util import *
-from test_framework.comptool import TestManager, TestInstance, RejectResult
+from test_framework.comptool import TestManager, TestInstance
 from test_framework.blocktools import *
 import time
 from test_framework.script import *
-from test_framework.cdefs import (ONE_MEGABYTE, LEGACY_MAX_BLOCK_SIZE,
-                                  MAX_BLOCK_SIGOPS_PER_MB, MAX_TX_SIGOPS_COUNT)
+from test_framework.cdefs import ONE_MEGABYTE
 from collections import deque
 
 
diff --git a/test/functional/abc-p2p-fullblocktest.py b/test/functional/abc-p2p-fullblocktest.py
--- a/test/functional/abc-p2p-fullblocktest.py
+++ b/test/functional/abc-p2p-fullblocktest.py
@@ -12,14 +12,14 @@
 """
 
 from test_framework.test_framework import ComparisonTestFramework
-from test_framework.util import assert_equal, assert_raises_rpc_error
+from test_framework.util import assert_equal
 from test_framework.comptool import TestManager, TestInstance, RejectResult
 from test_framework.blocktools import *
 import time
 from test_framework.key import CECKey
 from test_framework.script import *
-from test_framework.cdefs import (ONE_MEGABYTE, LEGACY_MAX_BLOCK_SIZE,
-                                  MAX_BLOCK_SIGOPS_PER_MB, MAX_TX_SIGOPS_COUNT)
+from test_framework.cdefs import (ONE_MEGABYTE, MAX_BLOCK_SIGOPS_PER_MB,
+                                  MAX_TX_SIGOPS_COUNT)
 from collections import deque
 
 REPLAY_PROTECTION_START_TIME = 2000000000
diff --git a/test/functional/abc-parkedchain.py b/test/functional/abc-parkedchain.py
--- a/test/functional/abc-parkedchain.py
+++ b/test/functional/abc-parkedchain.py
@@ -3,7 +3,6 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test the parckblock and unparkblock RPC calls."""
-import os
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal, wait_until
diff --git a/test/functional/abc-rpc.py b/test/functional/abc-rpc.py
--- a/test/functional/abc-rpc.py
+++ b/test/functional/abc-rpc.py
@@ -5,8 +5,6 @@
 
 # Exercise the Bitcoin ABC RPC calls.
 
-import time
-import random
 import re
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (assert_equal, assert_raises_rpc_error)
diff --git a/test/functional/abc-sync-chain.py b/test/functional/abc-sync-chain.py
--- a/test/functional/abc-sync-chain.py
+++ b/test/functional/abc-sync-chain.py
@@ -18,7 +18,7 @@
                                      msg_block,
                                      msg_headers)
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, wait_until, p2p_port
+from test_framework.util import wait_until, p2p_port
 
 
 NUM_IBD_BLOCKS = 50
diff --git a/test/functional/abc-transaction-ordering.py b/test/functional/abc-transaction-ordering.py
--- a/test/functional/abc-transaction-ordering.py
+++ b/test/functional/abc-transaction-ordering.py
@@ -8,11 +8,10 @@
 """
 
 from test_framework.test_framework import ComparisonTestFramework
-from test_framework.util import assert_equal, assert_raises_rpc_error
+from test_framework.util import assert_equal
 from test_framework.comptool import TestManager, TestInstance, RejectResult
 from test_framework.blocktools import *
 import time
-from test_framework.key import CECKey
 from test_framework.script import *
 from collections import deque