diff --git a/accounts/external/backend.go b/accounts/external/backend.go
index 0b336448fc..62322753da 100644
--- a/accounts/external/backend.go
+++ b/accounts/external/backend.go
@@ -239,7 +239,7 @@ func (api *ExternalSigner) SignTx(account accounts.Account, tx *types.Transactio
 		args.BlobHashes = tx.BlobHashes()
 		sidecar := tx.BlobTxSidecar()
 		if sidecar == nil {
-			return nil, fmt.Errorf("blobs must be present for signing")
+			return nil, errors.New("blobs must be present for signing")
 		}
 		args.Blobs = sidecar.Blobs
 		args.Commitments = sidecar.Commitments
diff --git a/cmd/devp2p/internal/ethtest/transaction.go b/cmd/devp2p/internal/ethtest/transaction.go
index 80b5d80745..cbbbbce8d9 100644
--- a/cmd/devp2p/internal/ethtest/transaction.go
+++ b/cmd/devp2p/internal/ethtest/transaction.go
@@ -102,7 +102,7 @@ func (s *Suite) sendTxs(t *utesting.T, txs []*types.Transaction) error {
 		}
 	}
 
-	return fmt.Errorf("timed out waiting for txs")
+	return errors.New("timed out waiting for txs")
 }
 
 func (s *Suite) sendInvalidTxs(t *utesting.T, txs []*types.Transaction) error {
diff --git a/core/blockchain.go b/core/blockchain.go
index 6808753734..fa112c2503 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -439,7 +439,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, genesis *Genesis
 			}
 
 			if alloc == nil {
-				return nil, fmt.Errorf("live blockchain tracer requires genesis alloc to be set")
+				return nil, errors.New("live blockchain tracer requires genesis alloc to be set")
 			}
 
 			bc.logger.OnGenesisBlock(bc.genesisBlock, alloc)
diff --git a/internal/era/iterator.go b/internal/era/iterator.go
index d90e9586a4..cc4f27c201 100644
--- a/internal/era/iterator.go
+++ b/internal/era/iterator.go
@@ -18,7 +18,6 @@ package era
 
 import (
 	"errors"
-	"fmt"
 	"io"
 	"math/big"
 
@@ -80,7 +79,7 @@ func (it *Iterator) Block() (*types.Block, error) {
 // Receipts returns the receipts for the iterator's current position.
 func (it *Iterator) Receipts() (types.Receipts, error) {
 	if it.inner.Receipts == nil {
-		return nil, fmt.Errorf("receipts must be non-nil")
+		return nil, errors.New("receipts must be non-nil")
 	}
 	var receipts types.Receipts
 	err := rlp.Decode(it.inner.Receipts, &receipts)
diff --git a/miner/worker.go b/miner/worker.go
index 9f8d9f663f..4924952478 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -75,7 +75,7 @@ type newPayloadResult struct {
 	receipts []*types.Receipt       // Receipts collected during construction
 }
 
-// generateParams wraps various of settings for generating sealing task.
+// generateParams wraps various settings for generating sealing task.
 type generateParams struct {
 	timestamp   uint64            // The timestamp for sealing task
 	forceTime   bool              // Flag whether the given timestamp is immutable or not
@@ -131,7 +131,7 @@ func (miner *Miner) prepareWork(genParams *generateParams) (*environment, error)
 	if genParams.parentHash != (common.Hash{}) {
 		block := miner.chain.GetBlockByHash(genParams.parentHash)
 		if block == nil {
-			return nil, fmt.Errorf("missing parent")
+			return nil, errors.New("missing parent")
 		}
 		parent = block.Header()
 	}