diff --git a/qa/rpc-tests/bip68-112-113-p2p.py b/qa/rpc-tests/bip68-112-113-p2p.py
index 3bcfdabe2..64553b2ca 100755
--- a/qa/rpc-tests/bip68-112-113-p2p.py
+++ b/qa/rpc-tests/bip68-112-113-p2p.py
@@ -173,7 +173,7 @@ class BIP68_112_113Test(ComparisonTestFramework):
         tx = self.create_transaction(self.nodes[0], input, self.nodeaddress, Decimal("49.98"))
         tx.nVersion = txversion
         signtx = self.sign_transaction(self.nodes[0], tx)
-        signtx.vin[0].scriptSig = CScript([-1, OP_NOP3, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
+        signtx.vin[0].scriptSig = CScript([-1, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
         return signtx
 
     def create_bip112txs(self, bip112inputs, varyOP_CSV, txversion, locktime_delta = 0):
@@ -196,9 +196,9 @@ class BIP68_112_113Test(ComparisonTestFramework):
                         tx.nVersion = txversion
                         signtx = self.sign_transaction(self.nodes[0], tx)
                         if (varyOP_CSV):
-                            signtx.vin[0].scriptSig = CScript([relative_locktimes[b31][b25][b22][b18], OP_NOP3, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
+                            signtx.vin[0].scriptSig = CScript([relative_locktimes[b31][b25][b22][b18], OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
                         else:
-                            signtx.vin[0].scriptSig = CScript([base_relative_locktime, OP_NOP3, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
+                            signtx.vin[0].scriptSig = CScript([base_relative_locktime, OP_CHECKSEQUENCEVERIFY, OP_DROP] + list(CScript(signtx.vin[0].scriptSig)))
                         b18txs.append(signtx)
                     b22txs.append(b18txs)
                 b25txs.append(b22txs)
diff --git a/qa/rpc-tests/bip9-softforks.py b/qa/rpc-tests/bip9-softforks.py
index d131eed92..5b1f5617a 100755
--- a/qa/rpc-tests/bip9-softforks.py
+++ b/qa/rpc-tests/bip9-softforks.py
@@ -9,7 +9,7 @@ from test_framework.util import *
 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_NOP3, OP_DROP
+from test_framework.script import CScript, OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP
 from io import BytesIO
 import time
 import itertools
@@ -197,7 +197,7 @@ class BIP9SoftForksTest(ComparisonTestFramework):
         '''Modify the signature in vin 0 of the tx to fail CSV
         Prepends -1 CSV DROP in the scriptSig itself.
         '''
-        tx.vin[0].scriptSig = CScript([OP_1NEGATE, OP_NOP3, OP_DROP] +
+        tx.vin[0].scriptSig = CScript([OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP] +
                                       list(CScript(tx.vin[0].scriptSig)))
 
     def sequence_lock_invalidate(self, tx):