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
@@ -6,10 +6,19 @@
 # Test for -rpcbind, as well as -rpcallowip and -rpcconnect
 
 from platform import uname
+import socket
+import sys
 
+from test_framework.netutil import addr_to_hex, all_interfaces, get_bind_addrs
 from test_framework.test_framework import BitcoinTestFramework, SkipTest
-from test_framework.util import *
-from test_framework.netutil import *
+from test_framework.util import (
+    assert_equal,
+    assert_raises_rpc_error,
+    get_datadir_path,
+    get_rpc_proxy,
+    rpc_port,
+    rpc_url,
+)
 
 
 class RPCBindTest(BitcoinTestFramework):
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
@@ -27,8 +27,8 @@
     assert_equal,
     assert_raises,
     assert_raises_rpc_error,
-    assert_is_hex_string,
     assert_is_hash_string,
+    assert_is_hex_string,
 )
 
 
diff --git a/test/functional/rpc_decodescript.py b/test/functional/rpc_decodescript.py
--- a/test/functional/rpc_decodescript.py
+++ b/test/functional/rpc_decodescript.py
@@ -3,9 +3,9 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 from test_framework.messages import CTransaction, FromHex, ToHex
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, bytes_to_hex_str, hex_str_to_bytes
 
 
 class DecodeScriptTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_fundrawtransaction.py b/test/functional/rpc_fundrawtransaction.py
--- a/test/functional/rpc_fundrawtransaction.py
+++ b/test/functional/rpc_fundrawtransaction.py
@@ -3,9 +3,18 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+from decimal import Decimal
+
+from test_framework.messages import CTransaction, FromHex
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from test_framework.mininode import CTransaction, FromHex
+from test_framework.util import (
+    assert_equal,
+    assert_fee_amount,
+    assert_greater_than,
+    assert_greater_than_or_equal,
+    assert_raises_rpc_error,
+    connect_nodes_bi,
+)
 
 
 def get_unspent(listunspent, amount):
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
@@ -7,8 +7,10 @@
 # Test InvalidateBlock code
 #
 
+import time
+
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, connect_nodes_bi, sync_blocks
 
 
 class InvalidateTest(BitcoinTestFramework):
diff --git a/test/functional/rpc_listtransactions.py b/test/functional/rpc_listtransactions.py
--- a/test/functional/rpc_listtransactions.py
+++ b/test/functional/rpc_listtransactions.py
@@ -5,8 +5,10 @@
 
 # Exercise the listtransactions API
 
+from decimal import Decimal
+
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_array_result
 
 
 class ListTransactionsTest(BitcoinTestFramework):
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
@@ -11,10 +11,16 @@
 #    - decoderawtransaction
 #    - getrawtransaction
 """
+from decimal import Decimal
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 from test_framework.txtools import pad_raw_tx
+from test_framework.util import (
+    assert_equal,
+    assert_greater_than,
+    assert_raises_rpc_error,
+    connect_nodes_bi,
+)
 
 # Create one-input, one-output, no-fee transaction:
 
diff --git a/test/functional/rpc_signrawtransaction.py b/test/functional/rpc_signrawtransaction.py
--- a/test/functional/rpc_signrawtransaction.py
+++ b/test/functional/rpc_signrawtransaction.py
@@ -4,7 +4,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class SignRawTransactionsTest(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
@@ -8,7 +8,11 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import (
+    assert_equal,
+    assert_raises_rpc_error,
+    connect_nodes,
+)
 
 
 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
@@ -7,13 +7,13 @@
 # Test multiple rpc user config option rpcauth
 #
 
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import str_to_b64str, assert_equal
-
-import os
 import http.client
+import os
 import urllib.parse
 
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, str_to_b64str
+
 
 class HTTPBasicsTest (BitcoinTestFramework):
     def set_test_params(self):