diff --git a/contrib/devtools/github-merge.py b/contrib/devtools/github-merge.py
index 03ccf5b62..8fce648fc 100755
--- a/contrib/devtools/github-merge.py
+++ b/contrib/devtools/github-merge.py
@@ -15,7 +15,7 @@
 # In case of a clean merge that is accepted by the user, the local branch with
 # name $BRANCH is overwritten with the merged result, and optionally pushed.
 from __future__ import division,print_function,unicode_literals
-import os,sys
+import os
 from sys import stdin,stdout,stderr
 import argparse
 import hashlib
diff --git a/test/functional/blockchain.py b/test/functional/blockchain.py
index 00ae3d757..2ed1b064a 100755
--- a/test/functional/blockchain.py
+++ b/test/functional/blockchain.py
@@ -23,8 +23,6 @@ from test_framework.util import (
     assert_raises_jsonrpc,
     assert_is_hex_string,
     assert_is_hash_string,
-    start_nodes,
-    connect_nodes_bi,
 )
 
 
diff --git a/test/functional/net.py b/test/functional/net.py
index 16476f7d3..fb4606444 100755
--- a/test/functional/net.py
+++ b/test/functional/net.py
@@ -15,7 +15,6 @@ from test_framework.util import (
     assert_raises_jsonrpc,
     connect_nodes_bi,
     p2p_port,
-    start_nodes,
 )
 
 
diff --git a/test/functional/rpcnamedargs.py b/test/functional/rpcnamedargs.py
index fd81b02ea..3b286000a 100755
--- a/test/functional/rpcnamedargs.py
+++ b/test/functional/rpcnamedargs.py
@@ -8,7 +8,6 @@ from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
     assert_raises_jsonrpc,
-    start_nodes,
 )
 
 
diff --git a/test/functional/signmessages.py b/test/functional/signmessages.py
index bfde8e40e..42f6a9daa 100755
--- a/test/functional/signmessages.py
+++ b/test/functional/signmessages.py
@@ -5,7 +5,6 @@
 """Test RPC commands for signing and verifying messages."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
 
 class SignMessagesTest(BitcoinTestFramework):
 
diff --git a/test/functional/wallet-accounts.py b/test/functional/wallet-accounts.py
index 8dc158911..e6635bea1 100755
--- a/test/functional/wallet-accounts.py
+++ b/test/functional/wallet-accounts.py
@@ -15,7 +15,6 @@ RPCs tested are:
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    start_nodes,
     assert_equal,
 )
 
diff --git a/test/functional/wallet-hd.py b/test/functional/wallet-hd.py
index bbf53e7db..aab3b4bc2 100755
--- a/test/functional/wallet-hd.py
+++ b/test/functional/wallet-hd.py
@@ -6,7 +6,6 @@
 
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
-    start_nodes,
     start_node,
     assert_equal,
     connect_nodes_bi,