diff --git a/src/test/util/setup_common.h b/src/test/util/setup_common.h
--- a/src/test/util/setup_common.h
+++ b/src/test/util/setup_common.h
@@ -166,11 +166,12 @@
      * @param input_signing_key  The key to spend the input_transaction
      * @param output_destination Where to send the output
      * @param output_amount      How much to send
+     * @param submit             Whether or not to submit to mempool
      */
     CMutableTransaction CreateValidMempoolTransaction(
         CTransactionRef input_transaction, int input_vout, int input_height,
         CKey input_signing_key, CScript output_destination,
-        Amount output_amount = COIN);
+        Amount output_amount = COIN, bool submit = true);
 
     ~TestChain100Setup();
 
diff --git a/src/test/util/setup_common.cpp b/src/test/util/setup_common.cpp
--- a/src/test/util/setup_common.cpp
+++ b/src/test/util/setup_common.cpp
@@ -327,7 +327,8 @@
 
 CMutableTransaction TestChain100Setup::CreateValidMempoolTransaction(
     CTransactionRef input_transaction, int input_vout, int input_height,
-    CKey input_signing_key, CScript output_destination, Amount output_amount) {
+    CKey input_signing_key, CScript output_destination, Amount output_amount,
+    bool submit) {
     // Transaction we will submit to the mempool
     CMutableTransaction mempool_txn;
 
@@ -360,8 +361,8 @@
     assert(SignTransaction(mempool_txn, &keystore, input_coins, nHashType,
                            input_errors));
 
-    // Add transaction to the mempool
-    {
+    // If submit=true, add transaction to the mempool.
+    if (submit) {
         LOCK(cs_main);
         const MempoolAcceptResult result = AcceptToMemoryPool(
             m_node.chainman->ActiveChainstate(), GetConfig(),