diff --git a/qa/zcash/performance-measurements.sh b/qa/zcash/performance-measurements.sh
index 76f41c0ab..15f3077b5 100755
--- a/qa/zcash/performance-measurements.sh
+++ b/qa/zcash/performance-measurements.sh
@@ -195,7 +195,7 @@ case "$1" in
                 zcash_rpc zcbenchmark verifyequihash 1000
                 ;;
             validatelargetx)
-                zcash_rpc zcbenchmark validatelargetx 5
+                zcash_rpc zcbenchmark validatelargetx 10 "${@:3}"
                 ;;
             trydecryptnotes)
                 zcash_rpc zcbenchmark trydecryptnotes 1000 "${@:3}"
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 90651ea74..3e63c3689 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2581,7 +2581,12 @@ UniValue zc_benchmark(const UniValue& params, bool fHelp)
         } else if (benchmarktype == "verifyequihash") {
             sample_times.push_back(benchmark_verify_equihash());
         } else if (benchmarktype == "validatelargetx") {
-            sample_times.push_back(benchmark_large_tx());
+            // Number of inputs in the spending transaction that we will simulate
+            int nInputs = 555;
+            if (params.size() >= 3) {
+                nInputs = params[2].get_int();
+            }
+            sample_times.push_back(benchmark_large_tx(nInputs));
         } else if (benchmarktype == "trydecryptnotes") {
             int nAddrs = params[2].get_int();
             sample_times.push_back(benchmark_try_decrypt_notes(nAddrs));
diff --git a/src/zcbenchmarks.cpp b/src/zcbenchmarks.cpp
index 4b17e57bf..9f9c1120d 100644
--- a/src/zcbenchmarks.cpp
+++ b/src/zcbenchmarks.cpp
@@ -222,11 +222,8 @@ double benchmark_verify_equihash()
     return timer_stop(tv_start);
 }
 
-double benchmark_large_tx()
+double benchmark_large_tx(size_t nInputs)
 {
-    // Number of inputs in the spending transaction that we will simulate
-    const size_t NUM_INPUTS = 555;
-
     // Create priv/pub key
     CKey priv;
     priv.MakeNewKey(false);
@@ -246,35 +243,24 @@ double benchmark_large_tx()
 
     CMutableTransaction spending_tx;
     auto input_hash = orig_tx.GetHash();
-    // Add NUM_INPUTS inputs
-    for (size_t i = 0; i < NUM_INPUTS; i++) {
+    // Add nInputs inputs
+    for (size_t i = 0; i < nInputs; i++) {
         spending_tx.vin.emplace_back(input_hash, 0);
     }
 
     // Sign for all the inputs
     auto consensusBranchId = NetworkUpgradeInfo[Consensus::UPGRADE_OVERWINTER].nBranchId;
-    for (size_t i = 0; i < NUM_INPUTS; i++) {
+    for (size_t i = 0; i < nInputs; i++) {
         SignSignature(tempKeystore, prevPubKey, spending_tx, i, 1000000, SIGHASH_ALL, consensusBranchId);
     }
 
-    // Serialize:
-    {
-        CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
-        ss << spending_tx;
-        //std::cout << "SIZE OF SPENDING TX: " << ss.size() << std::endl;
-
-        auto error = MAX_TX_SIZE / 20; // 5% error
-        assert(ss.size() < MAX_TX_SIZE + error);
-        assert(ss.size() > MAX_TX_SIZE - error);
-    }
-
     // Spending tx has all its inputs signed and does not need to be mutated anymore
     CTransaction final_spending_tx(spending_tx);
 
     // Benchmark signature verification costs:
     struct timeval tv_start;
     timer_start(tv_start);
-    for (size_t i = 0; i < NUM_INPUTS; i++) {
+    for (size_t i = 0; i < nInputs; i++) {
         ScriptError serror = SCRIPT_ERR_OK;
         assert(VerifyScript(final_spending_tx.vin[i].scriptSig,
                             prevPubKey,
diff --git a/src/zcbenchmarks.h b/src/zcbenchmarks.h
index ac87d0326..60a0be848 100644
--- a/src/zcbenchmarks.h
+++ b/src/zcbenchmarks.h
@@ -12,7 +12,7 @@ extern double benchmark_solve_equihash();
 extern std::vector<double> benchmark_solve_equihash_threaded(int nThreads);
 extern double benchmark_verify_joinsplit(const JSDescription &joinsplit);
 extern double benchmark_verify_equihash();
-extern double benchmark_large_tx();
+extern double benchmark_large_tx(size_t nInputs);
 extern double benchmark_try_decrypt_notes(size_t nAddrs);
 extern double benchmark_increment_note_witnesses(size_t nTxs);
 extern double benchmark_connectblock_slow();