diff --git a/test/functional/test_framework/address.py b/test/functional/test_framework/address.py
--- a/test/functional/test_framework/address.py
+++ b/test/functional/test_framework/address.py
@@ -4,7 +4,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Encode and decode BASE58, P2PKH and P2SH addresses."""
 
-from .script import hash256, hash160, sha256, CScript, OP_0
+from .script import hash256, hash160, CScript
 from .util import bytes_to_hex_str, hex_str_to_bytes
 
 chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -24,7 +24,7 @@
 import time
 
 from test_framework.siphash import siphash256
-from test_framework.util import hex_str_to_bytes, bytes_to_hex_str, wait_until
+from test_framework.util import hex_str_to_bytes, bytes_to_hex_str
 
 MIN_VERSION_SUPPORTED = 60001
 # past bip-31 for ping/pong
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -15,7 +15,7 @@
 import time
 
 from .authproxy import JSONRPCException
-from .mininode import COIN, ToHex, FromHex, CTransaction
+from .mininode import COIN, FromHex, CTransaction
 from .util import (
     assert_equal,
     get_rpc_proxy,
diff --git a/test/functional/test_framework/txtools.py b/test/functional/test_framework/txtools.py
--- a/test/functional/test_framework/txtools.py
+++ b/test/functional/test_framework/txtools.py
@@ -3,7 +3,6 @@
 from .script import OP_RETURN, CScript
 
 import random
-from binascii import hexlify, unhexlify
 
 
 def pad_tx(tx, pad_to_size=MIN_TX_SIZE):
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -21,7 +21,6 @@
 import os
 import time
 import shutil
-import signal
 import sys
 import subprocess
 import tempfile