Update wallet_multiwallet.py for descriptor and sqlite wallets

test/functional/test_framework/test_framework.py

@@ -103,7 +103,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         self.supports_cli = True
         self.bind_to_localhost_only = True
         self.parse_args()
-        self.default_wallet_name = ""
+        self.default_wallet_name = "default_wallet" if self.options.descriptors else ""
         self.wallet_data_filename = "wallet.dat"
         # Optional list of wallet names that can be set in set_test_params to
         # create and import keys to. If unset, default is len(nodes) *