diff --git a/test/functional/feature_maxuploadtarget.py b/test/functional/feature_maxuploadtarget.py
index 0b9d651226a..3ea412002a8 100755
--- a/test/functional/feature_maxuploadtarget.py
+++ b/test/functional/feature_maxuploadtarget.py
@@ -46,7 +46,7 @@ class MaxUploadTest(BitcoinTestFramework):
         self.num_nodes = 1
         self.extra_args = [[
             "-maxuploadtarget=800M",
-            "-acceptnonstdtxn=1",
+            "-datacarriersize=100000",
         ]]
         self.supports_cli = False
 
diff --git a/test/functional/mempool_limit.py b/test/functional/mempool_limit.py
index e92f73304be..7080662b490 100755
--- a/test/functional/mempool_limit.py
+++ b/test/functional/mempool_limit.py
@@ -23,7 +23,7 @@ class MempoolLimitTest(BitcoinTestFramework):
         self.setup_clean_chain = True
         self.num_nodes = 1
         self.extra_args = [[
-            "-acceptnonstdtxn=1",
+            "-datacarriersize=100000",
             "-maxmempool=5",
             "-spendzeroconfchange=0",
         ]]
diff --git a/test/functional/mining_prioritisetransaction.py b/test/functional/mining_prioritisetransaction.py
index fb3974c1d5d..64e66ac30a4 100755
--- a/test/functional/mining_prioritisetransaction.py
+++ b/test/functional/mining_prioritisetransaction.py
@@ -26,7 +26,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
         self.num_nodes = 1
         self.extra_args = [[
             "-printpriority=1",
-            "-acceptnonstdtxn=1",
+            "-datacarriersize=100000",
         ]] * self.num_nodes
         self.supports_cli = False