1 files changed, 1 insertions, 2 deletions
diff --git a/test/functional/feature_dersig.py b/test/functional/feature_dersig.py
index 8ff9498ef3..18416c3ab1 100755
--- a/test/functional/feature_dersig.py
+++ b/test/functional/feature_dersig.py
@@ -14,7 +14,6 @@ from test_framework.script import CScript
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
-    bytes_to_hex_str,
     wait_until,
 )
 
@@ -103,7 +102,7 @@ class BIP66Test(BitcoinTestFramework):
         # rejected from the mempool for exactly that reason.
         assert_equal(
             [{'txid': spendtx.hash, 'allowed': False, 'reject-reason': '64: non-mandatory-script-verify-flag (Non-canonical DER signature)'}],
-            self.nodes[0].testmempoolaccept(rawtxs=[bytes_to_hex_str(spendtx.serialize())], allowhighfees=True)
+            self.nodes[0].testmempoolaccept(rawtxs=[spendtx.serialize().hex()], allowhighfees=True)
         )
 
         # Now we verify that a block with this transaction is also invalid.