diff --git a/core/mapping/unmarshaler.go b/core/mapping/unmarshaler.go
index fe638ce1..f8674211 100644
--- a/core/mapping/unmarshaler.go
+++ b/core/mapping/unmarshaler.go
@@ -712,7 +712,7 @@ func (u *Unmarshaler) processNamedField(field reflect.StructField, value reflect
 	valuer := createValuer(m, opts)
 	mapValue, hasValue := getValue(valuer, canonicalKey)
 
-	// When fillDefault is used, m is a null value, hasValue must be false, all priority judgments fillDefault,
+	// When fillDefault is used, m is a null value, hasValue must be false, all priority judgments fillDefault.
 	if u.opts.fillDefault {
 		if !value.IsZero() {
 			return fmt.Errorf("set the default value, %s must be zero", fullName)
diff --git a/core/mapping/unmarshaler_test.go b/core/mapping/unmarshaler_test.go
index d2e6fc09..cdd7b98a 100644
--- a/core/mapping/unmarshaler_test.go
+++ b/core/mapping/unmarshaler_test.go
@@ -12,7 +12,6 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/assert"
-
 	"github.com/zeromicro/go-zero/core/stringx"
 )