diff --git a/qa/rpc-tests/listtransactions.py b/qa/rpc-tests/listtransactions.py
index f86f18de984..8f62d74b5ab 100755
--- a/qa/rpc-tests/listtransactions.py
+++ b/qa/rpc-tests/listtransactions.py
@@ -40,6 +40,10 @@ def check_array_result(object_array, to_match, expected):
 
 class ListTransactionsTest(BitcoinTestFramework):
 
+    def setup_nodes(self):
+        node_count=4
+        return start_nodes(node_count, self.options.tmpdir, [["-mempoolreplacement=1"]] * node_count)
+
     def run_test(self):
         # Simple send, 0 to 1:
         txid = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.1)
diff --git a/src/main.h b/src/main.h
index 7ae8eec4df0..de38f79b64f 100644
--- a/src/main.h
+++ b/src/main.h
@@ -111,7 +111,7 @@ static const unsigned int DEFAULT_BANSCORE_THRESHOLD = 100;
 
 static const bool DEFAULT_TESTSAFEMODE = false;
 /** Default for -mempoolreplacement */
-static const bool DEFAULT_ENABLE_REPLACEMENT = true;
+static const bool DEFAULT_ENABLE_REPLACEMENT = false;
 
 /** Maximum number of headers to announce when relaying blocks with headers message.*/
 static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8;