diff --git a/test/functional/abc-parkedchain.py b/test/functional/abc-parkedchain.py
--- a/test/functional/abc-parkedchain.py
+++ b/test/functional/abc-parkedchain.py
@@ -5,7 +5,11 @@
 """Test the parckblock and unparkblock RPC calls."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, connect_nodes_bi, wait_until
+from test_framework.util import (
+    assert_equal,
+    connect_nodes_bi,
+    wait_until
+)
 
 
 class ParkedChainTest(BitcoinTestFramework):
diff --git a/test/functional/abc_p2p_compactblocks.py b/test/functional/abc_p2p_compactblocks.py
--- a/test/functional/abc_p2p_compactblocks.py
+++ b/test/functional/abc_p2p_compactblocks.py
@@ -40,7 +40,10 @@
 from test_framework.script import CScript, OP_RETURN, OP_TRUE
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.txtools import pad_tx
-from test_framework.util import assert_equal, wait_until
+from test_framework.util import (
+    assert_equal,
+    wait_until
+)
 
 
 class PreviousSpendableOutput():
diff --git a/test/functional/feature_notifications.py b/test/functional/feature_notifications.py
--- a/test/functional/feature_notifications.py
+++ b/test/functional/feature_notifications.py
@@ -8,7 +8,11 @@
 
 from test_framework.address import ADDRESS_BCHREG_UNSPENDABLE
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, connect_nodes_bi, wait_until
+from test_framework.util import (
+    assert_equal,
+    connect_nodes_bi,
+    wait_until
+)
 
 FORK_WARNING_MESSAGE = "Warning: Large-work fork detected, forking after block {}"