diff --git a/db.go b/db.go
index 9db7c767..6da4e1b8 100644
--- a/db.go
+++ b/db.go
@@ -20,10 +20,10 @@ import (
 )
 
 const (
-	fileLockName       = "FLOCK"
-	dataFileNameSuffix = ".SEG"
-	hintFileNameSuffix = ".HINT"
-	mergeFinNameSuffix = ".MERGEFIN"
+	fileLockName        = "FLOCK"
+	dataFileNameSuffix  = ".SEG"
+	hintFileNameSuffix  = ".HINT"
+	mergeFileNameSuffix = ".MERGEFIN"
 )
 
 // DB represents a ROSEDB database instance.
@@ -582,7 +582,7 @@ func checkOptions(options Options) error {
 	if len(options.AutoMergeCronExpr) > 0 {
 		if _, err := cron.NewParser(cron.SecondOptional | cron.Minute | cron.Hour | cron.Dom | cron.Month | cron.Dow | cron.Descriptor).
 			Parse(options.AutoMergeCronExpr); err != nil {
-			return fmt.Errorf("databse auto merge cron expression is invalid, err: %s", err)
+			return fmt.Errorf("database auto merge cron expression is invalid, err: %s", err)
 		}
 	}
 
diff --git a/merge.go b/merge.go
index 85c72712..6b1626b0 100644
--- a/merge.go
+++ b/merge.go
@@ -215,7 +215,7 @@ func (db *DB) openMergeFinishedFile() (*wal.WAL, error) {
 	return wal.Open(wal.Options{
 		DirPath:        db.options.DirPath,
 		SegmentSize:    GB,
-		SegmentFileExt: mergeFinNameSuffix,
+		SegmentFileExt: mergeFileNameSuffix,
 		Sync:           false,
 		BytesPerSync:   0,
 		BlockCache:     0,
@@ -293,7 +293,7 @@ func loadMergeFiles(dirPath string) error {
 	// copy MERGEFINISHED and HINT files to the original data directory
 	// there is only one merge finished file, so the file id is always 1,
 	// the same as the hint file.
-	copyFile(mergeFinNameSuffix, 1, true)
+	copyFile(mergeFileNameSuffix, 1, true)
 	copyFile(hintFileNameSuffix, 1, true)
 
 	return nil
@@ -301,7 +301,7 @@ func loadMergeFiles(dirPath string) error {
 
 func getMergeFinSegmentId(mergePath string) (wal.SegmentID, error) {
 	// check if the merge operation is completed
-	mergeFinFile, err := os.Open(wal.SegmentFileName(mergePath, mergeFinNameSuffix, 1))
+	mergeFinFile, err := os.Open(wal.SegmentFileName(mergePath, mergeFileNameSuffix, 1))
 	if err != nil {
 		// if the merge finished file does not exist, it means that the merge operation is not completed.
 		// so we should remove the merge directory and return nil.
diff --git a/utils/rand_kv.go b/utils/rand_kv.go
index 264e16e3..e4f36bba 100644
--- a/utils/rand_kv.go
+++ b/utils/rand_kv.go
@@ -13,7 +13,7 @@ var (
 	letters = []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
 )
 
-// GetTestKey get formated key, for test only
+// GetTestKey get formatted key, for test only
 func GetTestKey(i int) []byte {
 	return []byte(fmt.Sprintf("rosedb-test-key-%09d", i))
 }