diff --git a/vms/avm/txs/mempool/mempool.go b/vms/avm/txs/mempool/mempool.go
index 254313322f9b..b4b05a72d2a3 100644
--- a/vms/avm/txs/mempool/mempool.go
+++ b/vms/avm/txs/mempool/mempool.go
@@ -35,10 +35,10 @@ const (
 var (
 	_ Mempool = (*mempool)(nil)
 
-	errDuplicateTx          = errors.New("duplicate tx")
-	errTxTooLarge           = errors.New("tx too large")
-	errMempoolFull          = errors.New("mempool is full")
-	errConflictsWithOtherTx = errors.New("tx conflicts with other tx")
+	ErrDuplicateTx          = errors.New("duplicate tx")
+	ErrTxTooLarge           = errors.New("tx too large")
+	ErrMempoolFull          = errors.New("mempool is full")
+	ErrConflictsWithOtherTx = errors.New("tx conflicts with other tx")
 )
 
 // Mempool contains transactions that have not yet been put into a block.
@@ -114,13 +114,13 @@ func (m *mempool) Add(tx *txs.Tx) error {
 	defer m.lock.Unlock()
 
 	if _, ok := m.unissuedTxs.Get(txID); ok {
-		return fmt.Errorf("%w: %s", errDuplicateTx, txID)
+		return fmt.Errorf("%w: %s", ErrDuplicateTx, txID)
 	}
 
 	txSize := len(tx.Bytes())
 	if txSize > MaxTxSize {
 		return fmt.Errorf("%w: %s size (%d) > max size (%d)",
-			errTxTooLarge,
+			ErrTxTooLarge,
 			txID,
 			txSize,
 			MaxTxSize,
@@ -128,7 +128,7 @@ func (m *mempool) Add(tx *txs.Tx) error {
 	}
 	if txSize > m.bytesAvailable {
 		return fmt.Errorf("%w: %s size (%d) > available space (%d)",
-			errMempoolFull,
+			ErrMempoolFull,
 			txID,
 			txSize,
 			m.bytesAvailable,
@@ -137,7 +137,7 @@ func (m *mempool) Add(tx *txs.Tx) error {
 
 	inputs := tx.Unsigned.InputIDs()
 	if m.consumedUTXOs.Overlaps(inputs) {
-		return fmt.Errorf("%w: %s", errConflictsWithOtherTx, txID)
+		return fmt.Errorf("%w: %s", ErrConflictsWithOtherTx, txID)
 	}
 
 	m.bytesAvailable -= txSize
diff --git a/vms/avm/txs/mempool/mempool_test.go b/vms/avm/txs/mempool/mempool_test.go
index fff0f9f21248..ae1a75dbba17 100644
--- a/vms/avm/txs/mempool/mempool_test.go
+++ b/vms/avm/txs/mempool/mempool_test.go
@@ -37,25 +37,25 @@ func TestAdd(t *testing.T) {
 			name:       "attempt adding duplicate tx",
 			initialTxs: []*txs.Tx{tx0},
 			tx:         tx0,
-			err:        errDuplicateTx,
+			err:        ErrDuplicateTx,
 		},
 		{
 			name:       "attempt adding too large tx",
 			initialTxs: nil,
 			tx:         newTx(0, MaxTxSize+1),
-			err:        errTxTooLarge,
+			err:        ErrTxTooLarge,
 		},
 		{
 			name:       "attempt adding tx when full",
 			initialTxs: newTxs(maxMempoolSize/MaxTxSize, MaxTxSize),
 			tx:         newTx(maxMempoolSize/MaxTxSize, MaxTxSize),
-			err:        errMempoolFull,
+			err:        ErrMempoolFull,
 		},
 		{
 			name:       "attempt adding conflicting tx",
 			initialTxs: []*txs.Tx{tx0},
 			tx:         newTx(0, 32),
-			err:        errConflictsWithOtherTx,
+			err:        ErrConflictsWithOtherTx,
 		},
 	}
 	for _, test := range tests {