diff --git a/schema/index_test.go b/schema/index_test.go
index 895da322..1fe31cc1 100644
--- a/schema/index_test.go
+++ b/schema/index_test.go
@@ -20,15 +20,15 @@ type UserIndex struct {
 	MemberNumber string `gorm:"index:idx_id,priority:1"`
 	Name7        string `gorm:"index:type"`
 
-	// Composite Index: In the same level of struct.
+	// Composite Index: Flattened structure.
 	Data0A string `gorm:"index:,composite:comp_id0"`
 	Data0B string `gorm:"index:,composite:comp_id0"`
 
-	// Composite Index: In the different levels of struct.
+	// Composite Index: Nested structure.
 	Data1A string `gorm:"index:,composite:comp_id1"`
 	CompIdxLevel1C
 
-	// Composite Index: Unique and priority
+	// Composite Index: Unique and priority.
 	Data2A string `gorm:"index:,unique,composite:comp_id2,priority:2"`
 	CompIdxLevel2C
 }