diff --git a/qa/rpc-tests/decodescript.py b/qa/rpc-tests/decodescript.py
index ce3bc94ef..89364a840 100755
--- a/qa/rpc-tests/decodescript.py
+++ b/qa/rpc-tests/decodescript.py
@@ -4,7 +4,9 @@
 # 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, initialize_chain_clean, \
+    start_nodes
+
 
 class DecodeScriptTest(BitcoinTestFramework):
     """Tests decoding scripts via RPC command "decodescript"."""
diff --git a/qa/rpc-tests/disablewallet.py b/qa/rpc-tests/disablewallet.py
index 67acdcea1..339c6a8f6 100755
--- a/qa/rpc-tests/disablewallet.py
+++ b/qa/rpc-tests/disablewallet.py
@@ -8,7 +8,8 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import initialize_chain_clean, start_nodes
+
 
 class DisableWalletTest (BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/forknotify.py b/qa/rpc-tests/forknotify.py
index 0acef8e30..059bfadde 100755
--- a/qa/rpc-tests/forknotify.py
+++ b/qa/rpc-tests/forknotify.py
@@ -8,9 +8,9 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import start_node, connect_nodes
+
 import os
-import shutil
 
 class ForkNotifyTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/fundrawtransaction.py b/qa/rpc-tests/fundrawtransaction.py
index 1d15fd132..42896be4f 100755
--- a/qa/rpc-tests/fundrawtransaction.py
+++ b/qa/rpc-tests/fundrawtransaction.py
@@ -4,9 +4,12 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from pprint import pprint
-from time import sleep
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, assert_greater_than, \
+    initialize_chain_clean, start_nodes, connect_nodes_bi, stop_nodes, \
+    wait_bitcoinds
+
+from decimal import Decimal
 
 # Create one-input, one-output, no-fee transaction:
 class RawTransactionsTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/getblocktemplate.py b/qa/rpc-tests/getblocktemplate.py
index c9777c0c7..82082afa9 100755
--- a/qa/rpc-tests/getblocktemplate.py
+++ b/qa/rpc-tests/getblocktemplate.py
@@ -4,7 +4,8 @@
 # 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 initialize_chain_clean, start_nodes, \
+    connect_nodes_bi
 
 
 class GetBlockTemplateTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/getblocktemplate_longpoll.py b/qa/rpc-tests/getblocktemplate_longpoll.py
index aab456242..37a40384b 100755
--- a/qa/rpc-tests/getblocktemplate_longpoll.py
+++ b/qa/rpc-tests/getblocktemplate_longpoll.py
@@ -4,8 +4,10 @@
 # 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.authproxy import AuthServiceProxy
+from test_framework.util import random_transaction
 
+from decimal import Decimal
 
 def check_array_result(object_array, to_match, expected):
     """
diff --git a/qa/rpc-tests/getblocktemplate_proposals.py b/qa/rpc-tests/getblocktemplate_proposals.py
index 0c9e7e4cc..16b2e9b94 100755
--- a/qa/rpc-tests/getblocktemplate_proposals.py
+++ b/qa/rpc-tests/getblocktemplate_proposals.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.authproxy import JSONRPCException
 
 from binascii import a2b_hex, b2a_hex
 from hashlib import sha256
diff --git a/qa/rpc-tests/hardforkdetection.py b/qa/rpc-tests/hardforkdetection.py
index d399dc964..553f363a9 100755
--- a/qa/rpc-tests/hardforkdetection.py
+++ b/qa/rpc-tests/hardforkdetection.py
@@ -5,9 +5,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, start_node
+
 import os
-import shutil
 
 class HardForkDetectionTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/httpbasics.py b/qa/rpc-tests/httpbasics.py
index b66533543..5944bb488 100755
--- a/qa/rpc-tests/httpbasics.py
+++ b/qa/rpc-tests/httpbasics.py
@@ -8,7 +8,8 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, start_nodes
+
 import base64
 
 try:
diff --git a/qa/rpc-tests/invalidateblock.py b/qa/rpc-tests/invalidateblock.py
index 2b9c8154e..9e9917b89 100755
--- a/qa/rpc-tests/invalidateblock.py
+++ b/qa/rpc-tests/invalidateblock.py
@@ -8,7 +8,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import initialize_chain_clean, start_node, \
+    connect_nodes_bi, sync_blocks
+
+import time
 
 class InvalidateTest(BitcoinTestFramework):
     
diff --git a/qa/rpc-tests/invalidblockrequest.py b/qa/rpc-tests/invalidblockrequest.py
index 272cc08f9..0ef353628 100755
--- a/qa/rpc-tests/invalidblockrequest.py
+++ b/qa/rpc-tests/invalidblockrequest.py
@@ -5,11 +5,11 @@
 #
 
 from test_framework.test_framework import ComparisonTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal
 from test_framework.comptool import TestManager, TestInstance
-from test_framework.mininode import *
-from test_framework.blocktools import *
-import logging
+from test_framework.mininode import NetworkThread
+from test_framework.blocktools import create_block, create_coinbase, create_transaction
+
 import copy
 import time
 
diff --git a/qa/rpc-tests/keypool.py b/qa/rpc-tests/keypool.py
index 38d6874dc..a7b32e13f 100755
--- a/qa/rpc-tests/keypool.py
+++ b/qa/rpc-tests/keypool.py
@@ -6,18 +6,17 @@
 # Exercise the wallet keypool, and interaction with wallet encryption/locking
 
 # Add python-bitcoinrpc to module search path:
+
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import check_json_precision, initialize_chain, \
+    start_nodes, start_node, stop_nodes, wait_bitcoinds, bitcoind_processes
+
 import os
 import sys
-
-import json
 import shutil
-import subprocess
 import tempfile
 import traceback
 
-from test_framework.util import *
-
-
 def check_array_result(object_array, to_match, expected):
     """
     Pass in array of JSON objects, a dictionary with key/value pairs
diff --git a/qa/rpc-tests/listtransactions.py b/qa/rpc-tests/listtransactions.py
index 4df8d795d..a735f41ab 100755
--- a/qa/rpc-tests/listtransactions.py
+++ b/qa/rpc-tests/listtransactions.py
@@ -6,8 +6,8 @@
 # Exercise the listtransactions API
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 
+from decimal import Decimal
 
 def check_array_result(object_array, to_match, expected):
     """
diff --git a/qa/rpc-tests/maxblocksinflight.py b/qa/rpc-tests/maxblocksinflight.py
index a601147ce..4c646040b 100755
--- a/qa/rpc-tests/maxblocksinflight.py
+++ b/qa/rpc-tests/maxblocksinflight.py
@@ -4,9 +4,15 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 
-from test_framework.mininode import *
+from test_framework.mininode import NodeConn, NodeConnCB, NetworkThread, \
+    EarlyDisconnectError, CInv, msg_inv, mininode_lock
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import initialize_chain_clean, start_nodes, \
+    p2p_port
+
+import os
+import time
+import random
 import logging
 
 '''
diff --git a/qa/rpc-tests/mempool_coinbase_spends.py b/qa/rpc-tests/mempool_coinbase_spends.py
index 578ddb1fb..a5f426092 100755
--- a/qa/rpc-tests/mempool_coinbase_spends.py
+++ b/qa/rpc-tests/mempool_coinbase_spends.py
@@ -9,9 +9,8 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os
-import shutil
+from test_framework.util import assert_equal, start_node, connect_nodes
+
 
 # Create one-input, one-output, no-fee transaction:
 class MempoolCoinbaseTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/mempool_resurrect_test.py b/qa/rpc-tests/mempool_resurrect_test.py
index dd3f0486f..1cbbd2cd5 100755
--- a/qa/rpc-tests/mempool_resurrect_test.py
+++ b/qa/rpc-tests/mempool_resurrect_test.py
@@ -9,9 +9,8 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os
-import shutil
+from test_framework.util import assert_equal, start_node
+
 
 # Create one-input, one-output, no-fee transaction:
 class MempoolCoinbaseTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/mempool_spendcoinbase.py b/qa/rpc-tests/mempool_spendcoinbase.py
index b2ec6937b..5366fb955 100755
--- a/qa/rpc-tests/mempool_spendcoinbase.py
+++ b/qa/rpc-tests/mempool_spendcoinbase.py
@@ -14,9 +14,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os
-import shutil
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, assert_greater_than, assert_raises, \
+    start_node
+
 
 # Create one-input, one-output, no-fee transaction:
 class MempoolSpendCoinbaseTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/mempool_tx_input_limit.py b/qa/rpc-tests/mempool_tx_input_limit.py
index 89a96a0ca..8483c5d0a 100755
--- a/qa/rpc-tests/mempool_tx_input_limit.py
+++ b/qa/rpc-tests/mempool_tx_input_limit.py
@@ -4,10 +4,12 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os
-import shutil
-from time import sleep
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_node, connect_nodes
+
+import time
+from decimal import Decimal
 
 # Test -mempooltxinputlimit
 class MempoolTxInputLimitTest(BitcoinTestFramework):
@@ -44,7 +46,7 @@ class MempoolTxInputLimitTest(BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
@@ -90,7 +92,7 @@ class MempoolTxInputLimitTest(BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 msg = results[0]["error"]["message"]
diff --git a/qa/rpc-tests/merkle_blocks.py b/qa/rpc-tests/merkle_blocks.py
index 5c333124f..2c0fcd203 100755
--- a/qa/rpc-tests/merkle_blocks.py
+++ b/qa/rpc-tests/merkle_blocks.py
@@ -8,9 +8,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os
-import shutil
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, assert_raises, \
+    initialize_chain_clean, start_node, connect_nodes
+
 
 class MerkleBlockTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/nodehandling.py b/qa/rpc-tests/nodehandling.py
index 9a77bd97e..391a935d0 100755
--- a/qa/rpc-tests/nodehandling.py
+++ b/qa/rpc-tests/nodehandling.py
@@ -8,13 +8,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import base64
+from test_framework.util import assert_equal, connect_nodes_bi, p2p_port
+
+import time
 
-try:
-    import http.client as httplib
-except ImportError:
-    import httplib
 try:
     import urllib.parse as urlparse
 except ImportError:
diff --git a/qa/rpc-tests/p2p-acceptblock.py b/qa/rpc-tests/p2p-acceptblock.py
index 83c03eeb7..25221fbed 100755
--- a/qa/rpc-tests/p2p-acceptblock.py
+++ b/qa/rpc-tests/p2p-acceptblock.py
@@ -4,12 +4,17 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 
-from test_framework.mininode import *
+from test_framework.mininode import CBlockHeader, CInv, NodeConn, NodeConnCB, \
+    NetworkThread, msg_block, msg_headers, msg_inv, msg_ping, msg_pong, \
+    mininode_lock
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import time
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_node, p2p_port
 from test_framework.blocktools import create_block, create_coinbase
 
+import os
+import time
+
 '''
 AcceptBlockTest -- test processing of unrequested blocks.
 
diff --git a/qa/rpc-tests/prioritisetransaction.py b/qa/rpc-tests/prioritisetransaction.py
index 19697fc4a..9eeb72e8c 100755
--- a/qa/rpc-tests/prioritisetransaction.py
+++ b/qa/rpc-tests/prioritisetransaction.py
@@ -4,9 +4,10 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_node, connect_nodes
 from test_framework.mininode import COIN
+
 import time
 
 
@@ -37,7 +38,7 @@ class PrioritiseTransactionTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
@@ -120,7 +121,7 @@ class PrioritiseTransactionTest (BitcoinTestFramework):
                     break
             if time.time() - start > 30:
                 raise AssertionError("Test timed out because prioritised transaction was not returned by getblocktemplate within 30 seconds.")
-            sleep(1)
+            time.sleep(1)
             block_template = self.nodes[0].getblocktemplate()
 
         assert(in_block_template)
diff --git a/qa/rpc-tests/proton_test.py b/qa/rpc-tests/proton_test.py
index b895c087f..d9fb27bd3 100755
--- a/qa/rpc-tests/proton_test.py
+++ b/qa/rpc-tests/proton_test.py
@@ -14,21 +14,13 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, bytes_to_hex_str, \
+    start_nodes
+
 from proton.handlers import MessagingHandler
 from proton.reactor import Container
-import binascii
-import struct
-import threading
 
-try:
-    import http.client as httplib
-except ImportError:
-    import httplib
-try:
-    import urllib.parse as urlparse
-except ImportError:
-    import urlparse
+import threading
 
 
 class Server(MessagingHandler):
diff --git a/qa/rpc-tests/proxy_test.py b/qa/rpc-tests/proxy_test.py
index 3623c1616..e4fb48820 100755
--- a/qa/rpc-tests/proxy_test.py
+++ b/qa/rpc-tests/proxy_test.py
@@ -2,14 +2,14 @@
 # Copyright (c) 2015 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
-import socket
-import traceback, sys
-from binascii import hexlify
-import time, os
 
 from test_framework.socks5 import Socks5Configuration, Socks5Command, Socks5Server, AddressType
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, start_nodes
+
+import socket
+import os
+
 '''
 Test plan:
 - Start bitcoind's with different proxy configurations
diff --git a/qa/rpc-tests/pruning.py b/qa/rpc-tests/pruning.py
index 21f8d6938..6bf79933c 100755
--- a/qa/rpc-tests/pruning.py
+++ b/qa/rpc-tests/pruning.py
@@ -12,8 +12,12 @@
 # ********
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import initialize_chain_clean, start_node, \
+    connect_nodes, stop_node, sync_blocks
+
 import os.path
+import time
 
 def calc_usage(blockdir):
     return sum(os.path.getsize(blockdir+f) for f in os.listdir(blockdir) if os.path.isfile(blockdir+f))/(1024*1024)
diff --git a/qa/rpc-tests/rawtransactions.py b/qa/rpc-tests/rawtransactions.py
index 45517d3fd..2eb04813f 100755
--- a/qa/rpc-tests/rawtransactions.py
+++ b/qa/rpc-tests/rawtransactions.py
@@ -9,9 +9,11 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from pprint import pprint
-from time import sleep
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi
+
+from decimal import Decimal
 
 # Create one-input, one-output, no-fee transaction:
 class RawTransactionsTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/receivedby.py b/qa/rpc-tests/receivedby.py
index 16d6bd4cf..fcab3e29d 100755
--- a/qa/rpc-tests/receivedby.py
+++ b/qa/rpc-tests/receivedby.py
@@ -6,8 +6,8 @@
 # Exercise the listreceivedbyaddress API
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 
+from decimal import Decimal
 
 def get_sub_array_from_array(object_array, to_match):
     '''
diff --git a/qa/rpc-tests/reindex.py b/qa/rpc-tests/reindex.py
index f2e3f248e..ae7563192 100755
--- a/qa/rpc-tests/reindex.py
+++ b/qa/rpc-tests/reindex.py
@@ -6,9 +6,11 @@
 #
 # Test -reindex with CheckBlockIndex
 #
+
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import os.path
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_node, stop_node, wait_bitcoinds
+
 
 class ReindexTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/rest.py b/qa/rpc-tests/rest.py
index d315c66d3..35d7aa5d1 100755
--- a/qa/rpc-tests/rest.py
+++ b/qa/rpc-tests/rest.py
@@ -9,12 +9,14 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from struct import *
+from test_framework.util import assert_equal, assert_greater_than, \
+    initialize_chain_clean, start_nodes, connect_nodes_bi
+
+import struct
 import binascii
 import json
 import StringIO
-import decimal
+from decimal import Decimal
 
 try:
     import http.client as httplib
@@ -28,7 +30,7 @@ except ImportError:
 def deser_uint256(f):
     r = 0
     for i in range(8):
-        t = unpack(b"<I", f.read(4))[0]
+        t = struct.unpack(b"<I", f.read(4))[0]
         r += t << (i * 32)
     return r
 
@@ -143,15 +145,15 @@ class RESTTest (BitcoinTestFramework):
 
         binaryRequest = b'\x01\x02'
         binaryRequest += binascii.unhexlify(txid)
-        binaryRequest += pack("i", n);
+        binaryRequest += struct.pack("i", n);
         binaryRequest += binascii.unhexlify(vintx);
-        binaryRequest += pack("i", 0);
+        binaryRequest += struct.pack("i", 0);
 
         bin_response = http_post_call(url.hostname, url.port, '/rest/getutxos'+self.FORMAT_SEPARATOR+'bin', binaryRequest)
         output = StringIO.StringIO()
         output.write(bin_response)
         output.seek(0)
-        chainHeight = unpack("i", output.read(4))[0]
+        chainHeight = struct.unpack("i", output.read(4))[0]
         hashFromBinResponse = hex(deser_uint256(output))[2:].zfill(65).rstrip("L")
 
         assert_equal(bb_hash, hashFromBinResponse) #check if getutxo's chaintip during calculation was fine
@@ -263,7 +265,7 @@ class RESTTest (BitcoinTestFramework):
         response_header_json = http_get_call(url.hostname, url.port, '/rest/headers/1/'+bb_hash+self.FORMAT_SEPARATOR+"json", True)
         assert_equal(response_header_json.status, 200)
         response_header_json_str = response_header_json.read()
-        json_obj = json.loads(response_header_json_str, parse_float=decimal.Decimal)
+        json_obj = json.loads(response_header_json_str, parse_float=Decimal)
         assert_equal(len(json_obj), 1) #ensure that there is one header in the json response
         assert_equal(json_obj[0]['hash'], bb_hash) #request/response hash should be the same
 
diff --git a/qa/rpc-tests/rpcbind_test.py b/qa/rpc-tests/rpcbind_test.py
index 04110c283..ca0f9b1f8 100755
--- a/qa/rpc-tests/rpcbind_test.py
+++ b/qa/rpc-tests/rpcbind_test.py
@@ -6,18 +6,19 @@
 # Test for -rpcbind, as well as -rpcallowip and -rpcconnect
 
 # Add python-bitcoinrpc to module search path:
+
+from test_framework.util import assert_equal, check_json_precision, \
+    initialize_chain, start_nodes, stop_nodes, wait_bitcoinds, \
+    bitcoind_processes, rpc_port
+from test_framework.authproxy import AuthServiceProxy
+from test_framework.netutil import addr_to_hex, get_bind_addrs, all_interfaces
+
 import os
 import sys
-
-import json
 import shutil
-import subprocess
 import tempfile
 import traceback
 
-from test_framework.util import *
-from test_framework.netutil import *
-
 def run_bind_test(tmpdir, allow_ips, connect_to, addresses, expected):
     '''
     Start a node with requested rpcallowip and rpcbind parameters,
diff --git a/qa/rpc-tests/script_test.py b/qa/rpc-tests/script_test.py
index 85927d02c..c3ad541e5 100755
--- a/qa/rpc-tests/script_test.py
+++ b/qa/rpc-tests/script_test.py
@@ -20,13 +20,12 @@ NOTE: This test is very slow and may take more than 40 minutes to run.
 '''
 
 from test_framework.test_framework import ComparisonTestFramework
-from test_framework.util import *
 from test_framework.comptool import TestInstance, TestManager
-from test_framework.mininode import *
-from test_framework.blocktools import *
-from test_framework.script import *
-import logging
-import copy
+from test_framework.mininode import NetworkThread
+from test_framework.blocktools import create_block, create_coinbase, create_transaction
+from test_framework.script import CScript, CScriptOp, CScriptNum, OPCODES_BY_NAME
+
+import os
 import json
 
 script_valid_file   = "../../src/test/data/script_valid.json"
diff --git a/qa/rpc-tests/signrawtransactions.py b/qa/rpc-tests/signrawtransactions.py
index 286fc8683..95d242854 100755
--- a/qa/rpc-tests/signrawtransactions.py
+++ b/qa/rpc-tests/signrawtransactions.py
@@ -4,7 +4,8 @@
 # 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, initialize_chain_clean, \
+    start_nodes
 
 
 class SignRawTransactionsTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/smartfees.py b/qa/rpc-tests/smartfees.py
index c15c5fda0..e111a406b 100755
--- a/qa/rpc-tests/smartfees.py
+++ b/qa/rpc-tests/smartfees.py
@@ -8,7 +8,11 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import start_node, connect_nodes, \
+    sync_blocks, sync_mempools
+
+import random
+from decimal import Decimal, ROUND_DOWN
 
 # Construct 2 trivial P2SH's and the ScriptSigs that spend them
 # So we can create many many transactions without needing to spend
diff --git a/qa/rpc-tests/test_framework/blockstore.py b/qa/rpc-tests/test_framework/blockstore.py
index c57b6df81..1fa981631 100644
--- a/qa/rpc-tests/test_framework/blockstore.py
+++ b/qa/rpc-tests/test_framework/blockstore.py
@@ -3,7 +3,10 @@
 #             and for constructing a getheaders message
 #
 
-from mininode import *
+from mininode import CBlock, CBlockHeader, CBlockLocator, CTransaction, msg_block, msg_headers, msg_tx
+
+import sys
+import cStringIO
 import dbm
 
 class BlockStore(object):
diff --git a/qa/rpc-tests/test_framework/blocktools.py b/qa/rpc-tests/test_framework/blocktools.py
index f397fe7cd..0f8147253 100644
--- a/qa/rpc-tests/test_framework/blocktools.py
+++ b/qa/rpc-tests/test_framework/blocktools.py
@@ -4,8 +4,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 
-from mininode import *
-from script import CScript, CScriptOp
+from mininode import CBlock, CTransaction, CTxIn, CTxOut, COutPoint, ser_string
 
 # Create a block (with regtest difficulty)
 def create_block(hashprev, coinbase, nTime=None):
diff --git a/qa/rpc-tests/test_framework/comptool.py b/qa/rpc-tests/test_framework/comptool.py
index b945f1bf2..7f9a97d68 100755
--- a/qa/rpc-tests/test_framework/comptool.py
+++ b/qa/rpc-tests/test_framework/comptool.py
@@ -4,10 +4,13 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #
 
-from mininode import *
+from mininode import CBlock, CTransaction, CInv, NodeConn, NodeConnCB, \
+    msg_inv, msg_getheaders, msg_ping, msg_mempool, mininode_lock, MAX_INV_SZ
 from blockstore import BlockStore, TxStore
 from util import p2p_port
 
+import time
+
 '''
 This is a tool for comparing two or more bitcoinds to each other
 using a script provided.
@@ -25,8 +28,6 @@ generator that returns TestInstance objects.  See below for definition.
 # on_getheaders: provide headers via BlockStore
 # on_getdata: provide blocks via BlockStore
 
-global mininode_lock
-
 def wait_until(predicate, attempts=float('inf'), timeout=float('inf')):
     attempt = 0
     elapsed = 0
diff --git a/qa/rpc-tests/test_framework/script.py b/qa/rpc-tests/test_framework/script.py
index e37ab5d45..ab7f4ec74 100644
--- a/qa/rpc-tests/test_framework/script.py
+++ b/qa/rpc-tests/test_framework/script.py
@@ -24,10 +24,10 @@ if sys.version > '3':
     bchr = lambda x: bytes([x])
     bord = lambda x: x
 
-import copy
 import struct
+import binascii
 
-import test_framework.bignum
+from test_framework import bignum
 
 MAX_SCRIPT_SIZE = 10000
 MAX_SCRIPT_ELEMENT_SIZE = 520
diff --git a/qa/rpc-tests/test_framework/test_framework.py b/qa/rpc-tests/test_framework/test_framework.py
index f44a10a40..56151bb3e 100755
--- a/qa/rpc-tests/test_framework/test_framework.py
+++ b/qa/rpc-tests/test_framework/test_framework.py
@@ -13,8 +13,11 @@ import shutil
 import tempfile
 import traceback
 
-from authproxy import AuthServiceProxy, JSONRPCException
-from util import *
+from authproxy import JSONRPCException
+from util import assert_equal, check_json_precision, \
+    initialize_chain, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi, stop_nodes, \
+    sync_blocks, sync_mempools, wait_bitcoinds
 
 
 class BitcoinTestFramework(object):
diff --git a/qa/rpc-tests/test_framework/util.py b/qa/rpc-tests/test_framework/util.py
index f5ef9dec6..4cf925c36 100644
--- a/qa/rpc-tests/test_framework/util.py
+++ b/qa/rpc-tests/test_framework/util.py
@@ -21,8 +21,7 @@ import subprocess
 import time
 import re
 
-from authproxy import AuthServiceProxy, JSONRPCException
-from util import *
+from authproxy import AuthServiceProxy
 
 def p2p_port(n):
     return 11000 + n + os.getpid()%999
diff --git a/qa/rpc-tests/txn_doublespend.py b/qa/rpc-tests/txn_doublespend.py
index 32699ad9d..3a45938b7 100755
--- a/qa/rpc-tests/txn_doublespend.py
+++ b/qa/rpc-tests/txn_doublespend.py
@@ -8,10 +8,9 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from decimal import Decimal
-import os
-import shutil
+from test_framework.util import assert_equal, connect_nodes, \
+    sync_blocks, gather_inputs
+
 
 class TxnMallTest(BitcoinTestFramework):
 
diff --git a/qa/rpc-tests/wallet.py b/qa/rpc-tests/wallet.py
index ff827892a..0e2a7983b 100755
--- a/qa/rpc-tests/wallet.py
+++ b/qa/rpc-tests/wallet.py
@@ -5,8 +5,13 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, assert_greater_than, \
+    initialize_chain_clean, start_nodes, start_node, connect_nodes_bi, \
+    stop_nodes, sync_blocks, sync_mempools, wait_bitcoinds
+
+import time
+from decimal import Decimal
 
 class WalletTest (BitcoinTestFramework):
 
@@ -306,7 +311,7 @@ class WalletTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[2].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 mytxid = results[0]["result"]["txid"]
@@ -363,7 +368,7 @@ class WalletTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[2].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 break
diff --git a/qa/rpc-tests/wallet_1941.py b/qa/rpc-tests/wallet_1941.py
index 5f2fe3f72..d6f024020 100755
--- a/qa/rpc-tests/wallet_1941.py
+++ b/qa/rpc-tests/wallet_1941.py
@@ -6,10 +6,12 @@
 # This is a regression test for #1941.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    initialize_datadir, start_nodes, start_node, connect_nodes_bi, \
+    bitcoind_processes
 
-import sys
+import time
+from decimal import Decimal
 
 starttime = 1388534400
 
@@ -49,7 +51,7 @@ class Wallet1941RegressionTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
diff --git a/qa/rpc-tests/wallet_nullifiers.py b/qa/rpc-tests/wallet_nullifiers.py
index 93f5a499d..b69b9d7d1 100755
--- a/qa/rpc-tests/wallet_nullifiers.py
+++ b/qa/rpc-tests/wallet_nullifiers.py
@@ -5,8 +5,11 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.util import assert_equal, start_node, \
+    start_nodes, connect_nodes_bi, bitcoind_processes
+
+import time
+from decimal import Decimal
 
 class WalletNullifiersTest (BitcoinTestFramework):
 
@@ -32,7 +35,7 @@ class WalletNullifiersTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 assert_equal("success", status)
@@ -73,7 +76,7 @@ class WalletNullifiersTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 assert_equal("success", status)
@@ -105,7 +108,7 @@ class WalletNullifiersTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[2].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 assert_equal("success", status)
@@ -146,7 +149,7 @@ class WalletNullifiersTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[1].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 assert_equal("success", status)
diff --git a/qa/rpc-tests/wallet_protectcoinbase.py b/qa/rpc-tests/wallet_protectcoinbase.py
index 1ed0d5b1f..6dd023c55 100755
--- a/qa/rpc-tests/wallet_protectcoinbase.py
+++ b/qa/rpc-tests/wallet_protectcoinbase.py
@@ -5,8 +5,13 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi
+
+import sys
+import time
+from decimal import Decimal
 
 class WalletProtectCoinbaseTest (BitcoinTestFramework):
 
@@ -35,7 +40,7 @@ class WalletProtectCoinbaseTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
@@ -94,7 +99,7 @@ class WalletProtectCoinbaseTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 errorString = results[0]["error"]["message"]
diff --git a/qa/rpc-tests/wallet_treestate.py b/qa/rpc-tests/wallet_treestate.py
index ae55368f0..c7fe9bf25 100755
--- a/qa/rpc-tests/wallet_treestate.py
+++ b/qa/rpc-tests/wallet_treestate.py
@@ -5,10 +5,11 @@
 
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from time import *
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi
 
-import sys
+import time
+from decimal import Decimal
 
 class WalletTreeStateTest (BitcoinTestFramework):
 
@@ -35,7 +36,7 @@ class WalletTreeStateTest (BitcoinTestFramework):
         for x in xrange(1, timeout):
             results = self.nodes[0].z_getoperationresult(opids)
             if len(results)==0:
-                sleep(1)
+                time.sleep(1)
             else:
                 status = results[0]["status"]
                 if status == "failed":
@@ -106,7 +107,7 @@ class WalletTreeStateTest (BitcoinTestFramework):
             status = results[0]["status"]
             if status == "executing":
                 break
-            sleep(1)
+            time.sleep(1)
 
         # Now mine Tx 1 which will change global treestate before Tx 2's second joinsplit begins processing
         self.sync_all()
diff --git a/qa/rpc-tests/walletbackup.py b/qa/rpc-tests/walletbackup.py
index 5f3eb6fcc..37c1db9a5 100755
--- a/qa/rpc-tests/walletbackup.py
+++ b/qa/rpc-tests/walletbackup.py
@@ -34,9 +34,16 @@ and confirm again balances are correct.
 """
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, start_node, connect_nodes, stop_node, \
+    sync_blocks, sync_mempools
+
+import os
+import shutil
 from random import randint
+from decimal import Decimal
 import logging
+
 logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.INFO)
 
 class WalletBackupTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/zapwallettxes.py b/qa/rpc-tests/zapwallettxes.py
index b15138818..c0c4e3646 100755
--- a/qa/rpc-tests/zapwallettxes.py
+++ b/qa/rpc-tests/zapwallettxes.py
@@ -4,7 +4,9 @@
 # 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.authproxy import JSONRPCException
+from test_framework.util import assert_equal, initialize_chain_clean, \
+    start_nodes, start_node, connect_nodes_bi, bitcoind_processes
 
 
 class ZapWalletTXesTest (BitcoinTestFramework):
diff --git a/qa/rpc-tests/zcjoinsplit.py b/qa/rpc-tests/zcjoinsplit.py
index 2b439e831..7e5aba6e3 100755
--- a/qa/rpc-tests/zcjoinsplit.py
+++ b/qa/rpc-tests/zcjoinsplit.py
@@ -5,11 +5,9 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from decimal import Decimal
-import os
-import shutil
-import sys
+from test_framework.util import assert_equal, start_node, \
+    gather_inputs
+
 
 class JoinSplitTest(BitcoinTestFramework):
     def setup_network(self):
diff --git a/qa/rpc-tests/zcjoinsplitdoublespend.py b/qa/rpc-tests/zcjoinsplitdoublespend.py
index cb89a9182..b8411c49d 100755
--- a/qa/rpc-tests/zcjoinsplitdoublespend.py
+++ b/qa/rpc-tests/zcjoinsplitdoublespend.py
@@ -5,11 +5,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from decimal import Decimal
-import os
-import shutil
-import sys
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, connect_nodes, \
+    gather_inputs, sync_blocks
+
 import time
 
 class JoinSplitTest(BitcoinTestFramework):
diff --git a/qa/rpc-tests/zmq_test.py b/qa/rpc-tests/zmq_test.py
index 97850bea3..901d61699 100755
--- a/qa/rpc-tests/zmq_test.py
+++ b/qa/rpc-tests/zmq_test.py
@@ -8,19 +8,10 @@
 #
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-import zmq
-import binascii
-import struct
+from test_framework.util import assert_equal, bytes_to_hex_str, start_nodes
 
-try:
-    import http.client as httplib
-except ImportError:
-    import httplib
-try:
-    import urllib.parse as urlparse
-except ImportError:
-    import urlparse
+import zmq
+import struct
 
 class ZMQTest (BitcoinTestFramework):