1 files changed, 7 insertions, 6 deletions
diff --git a/test/functional/bip9-softforks.py b/test/functional/bip9-softforks.py
index b90b0ca628..904789301a 100755
--- a/test/functional/bip9-softforks.py
+++ b/test/functional/bip9-softforks.py
@@ -15,6 +15,10 @@ mine a further 143 blocks (LOCKED_IN)
 test that enforcement has not triggered (which triggers ACTIVE)
 test that enforcement has triggered
 """
+from io import BytesIO
+import shutil
+import time
+import itertools
 
 from test_framework.test_framework import ComparisonTestFramework
 from test_framework.util import *
@@ -22,16 +26,12 @@ from test_framework.mininode import CTransaction, NetworkThread
 from test_framework.blocktools import create_coinbase, create_block
 from test_framework.comptool import TestInstance, TestManager
 from test_framework.script import CScript, OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP
-from io import BytesIO
-import time
-import itertools
 
 class BIP9SoftForksTest(ComparisonTestFramework):
-
-    def __init__(self):
-        super().__init__()
+    def set_test_params(self):
         self.num_nodes = 1
         self.extra_args = [['-whitelist=127.0.0.1']]
+        self.setup_clean_chain = True
 
     def run_test(self):
         self.test = TestManager(self, self.options.tmpdir)
@@ -240,6 +240,7 @@ class BIP9SoftForksTest(ComparisonTestFramework):
         # Restart all
         self.test.clear_all_connections()
         self.stop_nodes()
+        self.nodes = []
         shutil.rmtree(self.options.tmpdir + "/node0")
         self.setup_chain()
         self.setup_network()