diff --git a/integrationTests/chainSimulator/mempool/mempool_test.go b/integrationTests/chainSimulator/mempool/mempool_test.go
index 473a8f9bc3..1aad3d051a 100644
--- a/integrationTests/chainSimulator/mempool/mempool_test.go
+++ b/integrationTests/chainSimulator/mempool/mempool_test.go
@@ -1,22 +1,17 @@
 package mempool
 
 import (
-	"math/big"
 	"testing"
 	"time"
 
 	"github.com/multiversx/mx-chain-core-go/data/transaction"
 	"github.com/multiversx/mx-chain-go/config"
 	"github.com/multiversx/mx-chain-go/node/chainSimulator/configs"
-	"github.com/multiversx/mx-chain-go/node/chainSimulator/dtos"
 	"github.com/multiversx/mx-chain-go/storage"
-	logger "github.com/multiversx/mx-chain-logger-go"
 	"github.com/stretchr/testify/require"
 )
 
 func TestMempoolWithChainSimulator_Selection(t *testing.T) {
-	logger.SetLogLevel("*:INFO,txcache:DEBUG")
-
 	if testing.Short() {
 		t.Skip("this is not a short test")
 	}
@@ -56,6 +51,7 @@ func TestMempoolWithChainSimulator_Selection(t *testing.T) {
 	}
 
 	sendTransactions(t, simulator, transactions)
+	time.Sleep(durationWaitAfterSendMany)
 	require.Equal(t, 30_000, getNumTransactionsInPool(simulator, shard))
 
 	selectedTransactions, gas := selectTransactions(t, simulator, shard)
@@ -67,8 +63,8 @@ func TestMempoolWithChainSimulator_Selection(t *testing.T) {
 	require.Equal(t, 27_756, getNumTransactionsInCurrentBlock(simulator, shard))
 
 	selectedTransactions, gas = selectTransactions(t, simulator, shard)
-	require.Equal(t, 30_000, len(selectedTransactions))
-	require.Equal(t, 50_000*30_000, int(gas))
+	require.Equal(t, 30_000-27_756, len(selectedTransactions))
+	require.Equal(t, 50_000*(30_000-27_756), int(gas))
 }
 
 func TestMempoolWithChainSimulator_Eviction(t *testing.T) {
@@ -76,97 +72,77 @@ func TestMempoolWithChainSimulator_Eviction(t *testing.T) {
 		t.Skip("this is not a short test")
 	}
 
-	simulator := startChainSimulator(t, func(cfg *config.Configs) {})
-	node := simulator.GetNodeHandler(0)
-	mempool := node.GetDataComponents().Datapool().Transactions()
-
-	defer simulator.Close()
-
 	numSenders := 10000
 	numTransactionsPerSender := 30
+	shard := 0
 
-	senders := make([]dtos.WalletAddress, numSenders)
-	sendersNonces := make([]uint64, numSenders)
-
-	for i := 0; i < numSenders; i++ {
-		sender, err := simulator.GenerateAndMintWalletAddress(0, oneEGLD)
-		require.NoError(t, err)
-
-		senders[i] = sender
-	}
-
-	receiver, err := simulator.GenerateAndMintWalletAddress(0, big.NewInt(0))
-	require.NoError(t, err)
+	simulator := startChainSimulator(t, func(cfg *config.Configs) {})
+	defer simulator.Close()
 
-	err = simulator.GenerateBlocks(1)
-	require.Nil(t, err)
+	participants := createParticipants(t, simulator, numSenders)
+	noncesTracker := newNoncesTracker()
 
 	transactions := make([]*transaction.Transaction, 0, numSenders*numTransactionsPerSender)
 
 	for i := 0; i < numSenders; i++ {
+		sender := participants.sendersByShard[shard][i]
+		receiver := participants.receiverByShard[shard]
+
 		for j := 0; j < numTransactionsPerSender; j++ {
 			tx := &transaction.Transaction{
-				Nonce:     sendersNonces[i],
-				Value:     oneEGLD,
-				SndAddr:   senders[i].Bytes,
+				Nonce:     noncesTracker.getThenIncrementNonce(sender),
+				Value:     oneQuarterOfEGLD,
+				SndAddr:   sender.Bytes,
 				RcvAddr:   receiver.Bytes,
 				Data:      []byte{},
-				GasLimit:  50000,
+				GasLimit:  50_000,
 				GasPrice:  1_000_000_000,
 				ChainID:   []byte(configs.ChainID),
 				Version:   2,
 				Signature: []byte("signature"),
 			}
 
-			sendersNonces[i]++
 			transactions = append(transactions, tx)
 		}
 	}
 
-	numSent, err := node.GetFacadeHandler().SendBulkTransactions(transactions)
-	require.NoError(t, err)
-	require.Equal(t, 300000, int(numSent))
-
-	time.Sleep(1 * time.Second)
-	require.Equal(t, 300000, int(mempool.GetCounts().GetTotal()))
+	sendTransactions(t, simulator, transactions)
+	time.Sleep(durationWaitAfterSendMany)
+	require.Equal(t, 300_000, getNumTransactionsInPool(simulator, shard))
 
 	// Send one more transaction (fill up the mempool)
-	_, err = node.GetFacadeHandler().SendBulkTransactions([]*transaction.Transaction{
-		{
-			Nonce:     42,
-			Value:     oneEGLD,
-			SndAddr:   senders[7].Bytes,
-			RcvAddr:   receiver.Bytes,
-			Data:      []byte{},
-			GasLimit:  50000,
-			GasPrice:  1_000_000_000,
-			ChainID:   []byte(configs.ChainID),
-			Version:   2,
-			Signature: []byte("signature"),
-		},
+	sendTransaction(t, simulator, &transaction.Transaction{
+		Nonce:     42,
+		Value:     oneEGLD,
+		SndAddr:   participants.sendersByShard[shard][7].Bytes,
+		RcvAddr:   participants.receiverByShard[shard].Bytes,
+		Data:      []byte{},
+		GasLimit:  50000,
+		GasPrice:  1_000_000_000,
+		ChainID:   []byte(configs.ChainID),
+		Version:   2,
+		Signature: []byte("signature"),
 	})
-	require.NoError(t, err)
 
-	time.Sleep(42 * time.Millisecond)
-	require.Equal(t, 300001, int(mempool.GetCounts().GetTotal()))
+	time.Sleep(durationWaitAfterSendSome)
+	require.Equal(t, 300_001, getNumTransactionsInPool(simulator, shard))
 
 	// Send one more transaction to trigger eviction
-	_, err = node.GetFacadeHandler().SendBulkTransactions([]*transaction.Transaction{
-		{
-			Nonce:     42,
-			Value:     oneEGLD,
-			SndAddr:   senders[7].Bytes,
-			RcvAddr:   receiver.Bytes,
-			Data:      []byte{},
-			GasLimit:  50000,
-			GasPrice:  1_000_000_000,
-			ChainID:   []byte(configs.ChainID),
-			Version:   2,
-			Signature: []byte("signature"),
-		},
+	sendTransaction(t, simulator, &transaction.Transaction{
+		Nonce:     42,
+		Value:     oneEGLD,
+		SndAddr:   participants.sendersByShard[shard][7].Bytes,
+		RcvAddr:   participants.receiverByShard[shard].Bytes,
+		Data:      []byte{},
+		GasLimit:  50000,
+		GasPrice:  1_000_000_000,
+		ChainID:   []byte(configs.ChainID),
+		Version:   2,
+		Signature: []byte("signature"),
 	})
-	require.NoError(t, err)
 
 	time.Sleep(1 * time.Second)
-	require.Equal(t, 300000+1+1-int(storage.TxPoolSourceMeNumItemsToPreemptivelyEvict), int(mempool.GetCounts().GetTotal()))
+
+	expectedNumTransactionsInPool := 300_000 + 1 + 1 - int(storage.TxPoolSourceMeNumItemsToPreemptivelyEvict)
+	require.Equal(t, expectedNumTransactionsInPool, getNumTransactionsInPool(simulator, shard))
 }
diff --git a/integrationTests/chainSimulator/mempool/testutils_test.go b/integrationTests/chainSimulator/mempool/testutils_test.go
index 34eed359e8..4e1b0c4430 100644
--- a/integrationTests/chainSimulator/mempool/testutils_test.go
+++ b/integrationTests/chainSimulator/mempool/testutils_test.go
@@ -21,10 +21,11 @@ import (
 )
 
 var (
-	oneEGLD               = big.NewInt(1000000000000000000)
-	oneQuarterOfEGLD      = big.NewInt(250000000000000000)
-	oneCentOfEGLD         = big.NewInt(10000000000000000)
-	durationWaitAfterSend = 500 * time.Millisecond
+	oneEGLD                   = big.NewInt(1000000000000000000)
+	oneQuarterOfEGLD          = big.NewInt(250000000000000000)
+	oneCentOfEGLD             = big.NewInt(10000000000000000)
+	durationWaitAfterSendMany = 750 * time.Millisecond
+	durationWaitAfterSendSome = 10 * time.Millisecond
 )
 
 func startChainSimulator(t *testing.T, alterConfigsFunction func(cfg *config.Configs)) testsChainSimulator.ChainSimulator {
@@ -130,8 +131,10 @@ func sendTransactions(t *testing.T, simulator testsChainSimulator.ChainSimulator
 		require.NoError(t, err)
 		require.Equal(t, len(transactionsFromShard), int(numSent))
 	}
+}
 
-	time.Sleep(durationWaitAfterSend)
+func sendTransaction(t *testing.T, simulator testsChainSimulator.ChainSimulator, tx *transaction.Transaction) {
+	sendTransactions(t, simulator, []*transaction.Transaction{tx})
 }
 
 func selectTransactions(t *testing.T, simulator testsChainSimulator.ChainSimulator, shard int) ([]*txcache.WrappedTransaction, uint64) {