diff --git a/les/benchmark.go b/les/benchmark.go
index 95563a21aa..c63a2564d5 100644
--- a/les/benchmark.go
+++ b/les/benchmark.go
@@ -19,7 +19,7 @@ package les
 import (
 	crand "crypto/rand"
 	"encoding/binary"
-	"fmt"
+	"errors"
 	"math/big"
 	"math/rand"
 	"sync"
@@ -59,7 +59,7 @@ func (b *benchmarkBlockHeaders) init(h *serverHandler, count int) error {
 	b.offset = 0
 	b.randMax = h.blockchain.CurrentHeader().Number.Int64() + 1 - d
 	if b.randMax < 0 {
-		return fmt.Errorf("chain is too short")
+		return errors.New("chain is too short")
 	}
 	if b.reverse {
 		b.offset = d
@@ -137,7 +137,7 @@ func (b *benchmarkHelperTrie) init(h *serverHandler, count int) error {
 		b.headNum = b.sectionCount*params.CHTFrequency - 1
 	}
 	if b.sectionCount == 0 {
-		return fmt.Errorf("no processed sections available")
+		return errors.New("no processed sections available")
 	}
 	return nil
 }
@@ -338,7 +338,7 @@ func (h *serverHandler) measure(setup *benchmarkSetup, count int) error {
 	case <-h.closeCh:
 		clientPipe.Close()
 		serverPipe.Close()
-		return fmt.Errorf("Benchmark cancelled")
+		return errors.New("Benchmark cancelled")
 	}
 
 	setup.totalTime += time.Duration(mclock.Now() - start)
diff --git a/les/catalyst/api.go b/les/catalyst/api.go
index c9db514fcc..30b41101db 100644
--- a/les/catalyst/api.go
+++ b/les/catalyst/api.go
@@ -213,7 +213,7 @@ func (api *ConsensusAPI) ExchangeTransitionConfigurationV1(config engine.Transit
 				TerminalBlockNumber:     config.TerminalBlockNumber,
 			}, nil
 		}
-		return nil, fmt.Errorf("invalid terminal block hash")
+		return nil, errors.New("invalid terminal block hash")
 	}
 
 	return &engine.TransitionConfigurationV1{TerminalTotalDifficulty: (*hexutil.Big)(ttd)}, nil
diff --git a/les/client.go b/les/client.go
index 9561ba777e..bd6667429e 100644
--- a/les/client.go
+++ b/les/client.go
@@ -18,7 +18,7 @@
 package les
 
 import (
-	"fmt"
+	"errors"
 	"strings"
 	"time"
 
@@ -268,12 +268,12 @@ type LightDummyAPI struct{}
 
 // Etherbase is the address that mining rewards will be send to
 func (s *LightDummyAPI) Etherbase() (common.Address, error) {
-	return common.Address{}, fmt.Errorf("mining is not supported in light mode")
+	return common.Address{}, errors.New("mining is not supported in light mode")
 }
 
 // Coinbase is the address that mining rewards will be send to (alias for Etherbase)
 func (s *LightDummyAPI) Coinbase() (common.Address, error) {
-	return common.Address{}, fmt.Errorf("mining is not supported in light mode")
+	return common.Address{}, errors.New("mining is not supported in light mode")
 }
 
 // Hashrate returns the POW hashrate
diff --git a/les/retrieve.go b/les/retrieve.go
index 307af04212..2b9e239e9a 100644
--- a/les/retrieve.go
+++ b/les/retrieve.go
@@ -18,7 +18,7 @@ package les
 
 import (
 	"context"
-	"fmt"
+	"errors"
 	"sync"
 	"time"
 
@@ -110,7 +110,7 @@ func (rm *retrieveManager) retrieve(ctx context.Context, reqID uint64, req *dist
 	case <-ctx.Done():
 		sentReq.stop(ctx.Err())
 	case <-shutdown:
-		sentReq.stop(fmt.Errorf("client is shutting down"))
+		sentReq.stop(errors.New("client is shutting down"))
 	}
 	return sentReq.getError()
 }
diff --git a/light/trie_test.go b/light/trie_test.go
index 0ab3eb02a0..0a24609cbd 100644
--- a/light/trie_test.go
+++ b/light/trie_test.go
@@ -19,6 +19,7 @@ package light
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
 	"math/big"
 	"testing"
@@ -78,9 +79,9 @@ func diffTries(t1, t2 state.Trie) error {
 	case i2.Err != nil:
 		return fmt.Errorf("light trie iterator error: %v", i2.Err)
 	case i1.Next():
-		return fmt.Errorf("full trie iterator has more k/v pairs")
+		return errors.New("full trie iterator has more k/v pairs")
 	case i2.Next():
-		return fmt.Errorf("light trie iterator has more k/v pairs")
+		return errors.New("light trie iterator has more k/v pairs")
 	}
 	return nil
 }
diff --git a/signer/core/signed_data.go b/signer/core/signed_data.go
index 8ee572f53e..3c2b6f5d45 100644
--- a/signer/core/signed_data.go
+++ b/signer/core/signed_data.go
@@ -304,10 +304,10 @@ func (api *SignerAPI) EcRecover(ctx context.Context, data hexutil.Bytes, sig hex
 	//
 	// https://github.com/ethereum/go-ethereum/wiki/Management-APIs#personal_ecRecover
 	if len(sig) != 65 {
-		return common.Address{}, fmt.Errorf("signature must be 65 bytes long")
+		return common.Address{}, errors.New("signature must be 65 bytes long")
 	}
 	if sig[64] != 27 && sig[64] != 28 {
-		return common.Address{}, fmt.Errorf("invalid Ethereum signature (V is not 27 or 28)")
+		return common.Address{}, errors.New("invalid Ethereum signature (V is not 27 or 28)")
 	}
 	sig[64] -= 27 // Transform yellow paper V from 27/28 to 0/1
 	hash := accounts.TextHash(data)
diff --git a/signer/core/uiapi.go b/signer/core/uiapi.go
index 924203a139..4a060147a6 100644
--- a/signer/core/uiapi.go
+++ b/signer/core/uiapi.go
@@ -177,7 +177,7 @@ func (s *UIServerAPI) Export(ctx context.Context, addr common.Address) (json.Raw
 		return nil, err
 	}
 	if wallet.URL().Scheme != keystore.KeyStoreScheme {
-		return nil, fmt.Errorf("account is not a keystore-account")
+		return nil, errors.New("account is not a keystore-account")
 	}
 	return os.ReadFile(wallet.URL().Path)
 }
diff --git a/signer/rules/rules.go b/signer/rules/rules.go
index 5ed4514e02..c9921e57a9 100644
--- a/signer/rules/rules.go
+++ b/signer/rules/rules.go
@@ -18,6 +18,7 @@ package rules
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -146,7 +147,7 @@ func (r *rulesetUI) checkApproval(jsfunc string, jsarg []byte, err error) (bool,
 		log.Info("Op rejected")
 		return false, nil
 	}
-	return false, fmt.Errorf("unknown response")
+	return false, errors.New("unknown response")
 }
 
 func (r *rulesetUI) ApproveTx(request *core.SignTxRequest) (core.SignTxResponse, error) {