diff --git a/test/functional/feature_rbf.py b/test/functional/feature_rbf.py
index 7345cd2880..6e5a7b3928 100755
--- a/test/functional/feature_rbf.py
+++ b/test/functional/feature_rbf.py
@@ -33,7 +33,6 @@ class ReplaceByFeeTest(BitcoinTestFramework):
         self.num_nodes = 2
         self.extra_args = [
             [
-                "-maxorphantx=1000",
                 "-limitancestorcount=50",
                 "-limitancestorsize=101",
                 "-limitdescendantcount=200",
diff --git a/test/functional/mempool_package_onemore.py b/test/functional/mempool_package_onemore.py
index 669b1e65ee..fb0bf3a755 100755
--- a/test/functional/mempool_package_onemore.py
+++ b/test/functional/mempool_package_onemore.py
@@ -21,7 +21,6 @@ from test_framework.wallet import MiniWallet
 class MempoolPackagesTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
-        self.extra_args = [["-maxorphantx=1000"]]
 
     def chain_tx(self, utxos_to_spend, *, num_outputs=1):
         return self.wallet.send_self_transfer_multi(
diff --git a/test/functional/mempool_packages.py b/test/functional/mempool_packages.py
index 5a6a3d57b3..36dea877a6 100755
--- a/test/functional/mempool_packages.py
+++ b/test/functional/mempool_packages.py
@@ -34,10 +34,8 @@ class MempoolPackagesTest(BitcoinTestFramework):
         self.noban_tx_relay = True
         self.extra_args = [
             [
-                "-maxorphantx=1000",
             ],
             [
-                "-maxorphantx=1000",
                 "-limitancestorcount={}".format(CUSTOM_ANCESTOR_LIMIT),
                 "-limitdescendantcount={}".format(CUSTOM_DESCENDANT_LIMIT),
             ],