diff --git a/test/functional/mining_basic.py b/test/functional/mining_basic.py
--- a/test/functional/mining_basic.py
+++ b/test/functional/mining_basic.py
@@ -11,9 +11,9 @@
 import copy
 
 from test_framework.blocktools import create_coinbase
+from test_framework.messages import CBlock
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.mininode import CBlock
-from test_framework.util import *
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 def b2x(b):
diff --git a/test/functional/mining_getblocktemplate_longpoll.py b/test/functional/mining_getblocktemplate_longpoll.py
--- a/test/functional/mining_getblocktemplate_longpoll.py
+++ b/test/functional/mining_getblocktemplate_longpoll.py
@@ -3,11 +3,12 @@
 # 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 decimal import Decimal
 import threading
 
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import get_rpc_proxy, random_transaction
+
 
 class LongpollThread(threading.Thread):
 
diff --git a/test/functional/mining_prioritisetransaction.py b/test/functional/mining_prioritisetransaction.py
--- a/test/functional/mining_prioritisetransaction.py
+++ b/test/functional/mining_prioritisetransaction.py
@@ -7,12 +7,15 @@
 # Test PrioritiseTransaction code
 #
 
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from test_framework.mininode import COIN
+from test_framework.blocktools import (
+    create_confirmed_utxos,
+    send_big_transactions,
+)
 # FIXME: review how this test needs to be adapted w.r.t _LEGACY_MAX_BLOCK_SIZE
 from test_framework.cdefs import LEGACY_MAX_BLOCK_SIZE
-from test_framework.blocktools import send_big_transactions, create_confirmed_utxos
+from test_framework.messages import COIN
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import assert_equal, assert_raises_rpc_error
 
 
 class PrioritiseTransactionTest(BitcoinTestFramework):