test: Require standard txs in regtest

test/functional/mempool_limit.py

@@ -13,7 +13,11 @@ class MempoolLimitTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 1
-        self.extra_args = [["-maxmempool=5", "-spendzeroconfchange=0"]]
+        self.extra_args = [[
+            "-acceptnonstdtxn=1",
+            "-maxmempool=5",
+            "-spendzeroconfchange=0",
+        ]]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()