diff --git a/test/functional/abc-magnetic-anomaly-mining.py b/test/functional/abc-magnetic-anomaly-mining.py
--- a/test/functional/abc-magnetic-anomaly-mining.py
+++ b/test/functional/abc-magnetic-anomaly-mining.py
@@ -25,8 +25,7 @@
         self.blocks = {}
         self.mocktime = int(time.time()) - 600 * 100
 
-        extra_arg = ['-spendzeroconfchange=0', '-whitelist=127.0.0.1',
-                     "-replayprotectionactivationtime={}".format(10 * self.mocktime)]
+        extra_arg = ['-spendzeroconfchange=0', '-whitelist=127.0.0.1']
         self.extra_args = [extra_arg, extra_arg]
 
     def run_test(self):
diff --git a/test/functional/abc-p2p-fullblocktest.py b/test/functional/abc-p2p-fullblocktest.py
--- a/test/functional/abc-p2p-fullblocktest.py
+++ b/test/functional/abc-p2p-fullblocktest.py
@@ -53,8 +53,6 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 
-REPLAY_PROTECTION_START_TIME = 2000000000
-
 
 class PreviousSpendableOutput():
 
@@ -74,8 +72,6 @@
         self.blocks = {}
         self.excessive_block_size = 100 * ONE_MEGABYTE
         self.extra_args = [['-whitelist=127.0.0.1',
-                            "-replayprotectionactivationtime={}".format(
-                                REPLAY_PROTECTION_START_TIME),
                             "-excessiveblocksize={}".format(self.excessive_block_size)]]
 
     def add_options(self, parser):
diff --git a/test/functional/abc-transaction-ordering.py b/test/functional/abc-transaction-ordering.py
--- a/test/functional/abc-transaction-ordering.py
+++ b/test/functional/abc-transaction-ordering.py
@@ -31,9 +31,6 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 
-# far into the future
-REPLAY_PROTECTION_START_TIME = 2000000000
-
 
 class PreviousSpendableOutput():
 
@@ -51,8 +48,7 @@
         self.tip = None
         self.blocks = {}
         self.extra_args = [['-whitelist=127.0.0.1',
-                            '-relaypriority=0',
-                            "-replayprotectionactivationtime={}".format(REPLAY_PROTECTION_START_TIME)]]
+                            '-relaypriority=0']]
 
     def add_transactions_to_block(self, block, tx_list):
         [tx.rehash() for tx in tx_list]