diff --git a/eth/api.go b/eth/api.go
index 5d159108e..23b9743be 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -582,5 +582,5 @@ func (api *DebugAPI) GetAccessibleState(from, to rpc.BlockNumber) (uint64, error
 			return uint64(i), nil
 		}
 	}
-	return 0, fmt.Errorf("No state found")
+	return 0, fmt.Errorf("no state found")
 }
diff --git a/eth/tracers/js/goja.go b/eth/tracers/js/goja.go
index f54c80104..ae8b09a0f 100644
--- a/eth/tracers/js/goja.go
+++ b/eth/tracers/js/goja.go
@@ -548,10 +548,10 @@ func (mo *memoryObj) slice(begin, end int64) ([]byte, error) {
 		return []byte{}, nil
 	}
 	if end < begin || begin < 0 {
-		return nil, fmt.Errorf("Tracer accessed out of bound memory: offset %d, end %d", begin, end)
+		return nil, fmt.Errorf("tracer accessed out of bound memory: offset %d, end %d", begin, end)
 	}
 	if mo.memory.Len() < int(end) {
-		return nil, fmt.Errorf("Tracer accessed out of bound memory: available %d, offset %d, size %d", mo.memory.Len(), begin, end-begin)
+		return nil, fmt.Errorf("tracer accessed out of bound memory: available %d, offset %d, size %d", mo.memory.Len(), begin, end-begin)
 	}
 	return mo.memory.GetCopy(begin, end-begin), nil
 }
@@ -573,7 +573,7 @@ func (mo *memoryObj) GetUint(addr int64) goja.Value {
 // getUint returns the 32 bytes at the specified address interpreted as a uint.
 func (mo *memoryObj) getUint(addr int64) (*big.Int, error) {
 	if mo.memory.Len() < int(addr)+32 || addr < 0 {
-		return nil, fmt.Errorf("Tracer accessed out of bound memory: available %d, offset %d, size %d", mo.memory.Len(), addr, 32)
+		return nil, fmt.Errorf("tracer accessed out of bound memory: available %d, offset %d, size %d", mo.memory.Len(), addr, 32)
 	}
 	return new(big.Int).SetBytes(mo.memory.GetPtr(addr, 32)), nil
 }
@@ -613,7 +613,7 @@ func (s *stackObj) Peek(idx int) goja.Value {
 // peek returns the nth-from-the-top element of the stack.
 func (s *stackObj) peek(idx int) (*big.Int, error) {
 	if len(s.stack.Data()) <= idx || idx < 0 {
-		return nil, fmt.Errorf("Tracer accessed out of bound stack: size %d, index %d", len(s.stack.Data()), idx)
+		return nil, fmt.Errorf("tracer accessed out of bound stack: size %d, index %d", len(s.stack.Data()), idx)
 	}
 	return s.stack.Back(idx).ToBig(), nil
 }
diff --git a/internal/jsre/jsre.go b/internal/jsre/jsre.go
index 4de80a9e9..f6e21d2ef 100644
--- a/internal/jsre/jsre.go
+++ b/internal/jsre/jsre.go
@@ -322,11 +322,11 @@ func (re *JSRE) loadScript(call Call) (goja.Value, error) {
 	file = common.AbsolutePath(re.assetPath, file)
 	source, err := os.ReadFile(file)
 	if err != nil {
-		return nil, fmt.Errorf("Could not read file %s: %v", file, err)
+		return nil, fmt.Errorf("could not read file %s: %v", file, err)
 	}
 	value, err := compileAndRun(re.vm, file, string(source))
 	if err != nil {
-		return nil, fmt.Errorf("Error while compiling or running script: %v", err)
+		return nil, fmt.Errorf("error while compiling or running script: %v", err)
 	}
 	return value, nil
 }
diff --git a/light/txpool.go b/light/txpool.go
index a7df4aeec..413337208 100644
--- a/light/txpool.go
+++ b/light/txpool.go
@@ -398,7 +398,7 @@ func (pool *TxPool) add(ctx context.Context, tx *types.Transaction) error {
 	hash := tx.Hash()
 
 	if pool.pending[hash] != nil {
-		return fmt.Errorf("Known transaction (%x)", hash[:4])
+		return fmt.Errorf("known transaction (%x)", hash[:4])
 	}
 	err := pool.validateTx(ctx, tx)
 	if err != nil {