diff --git a/test/functional/bip65-cltv-p2p.py b/test/functional/bip65-cltv-p2p.py
index 7e5e4cf68..5a6f7121c 100755
--- a/test/functional/bip65-cltv-p2p.py
+++ b/test/functional/bip65-cltv-p2p.py
@@ -64,7 +64,7 @@ class BIP65Test(BitcoinTestFramework):
     def __init__(self):
         super().__init__()
         self.num_nodes = 1
-        self.extra_args = [['-promiscuousmempoolflags=1', '-whitelist=127.0.0.1']]
+        self.extra_args = [['-promiscuousmempoolflags=1', '-whitelist=127.0.0.1', '-dip3params=9000:9000']]
         self.setup_clean_chain = True
 
     def run_test(self):
diff --git a/test/functional/bipdersig-p2p.py b/test/functional/bipdersig-p2p.py
index 38a900954..b257de3a3 100755
--- a/test/functional/bipdersig-p2p.py
+++ b/test/functional/bipdersig-p2p.py
@@ -52,7 +52,7 @@ class BIP66Test(BitcoinTestFramework):
     def __init__(self):
         super().__init__()
         self.num_nodes = 1
-        self.extra_args = [['-promiscuousmempoolflags=1', '-whitelist=127.0.0.1']]
+        self.extra_args = [['-promiscuousmempoolflags=1', '-whitelist=127.0.0.1', '-dip3params=9000:9000']]
         self.setup_clean_chain = True
 
     def run_test(self):