diff --git a/feature/dynamodbstreams/attributevalue/decode_test.go b/feature/dynamodbstreams/attributevalue/decode_test.go
index 82a7e9ec08e..fb5ea599f48 100644
--- a/feature/dynamodbstreams/attributevalue/decode_test.go
+++ b/feature/dynamodbstreams/attributevalue/decode_test.go
@@ -951,7 +951,7 @@ func TestCustomDecodeSAndDefaultDecodeN(t *testing.T) {
 	}
 	expectedValue := A{
 		TimeFieldS: time.Unix(120, 0).UTC(),
-		TimeFieldN: time.Unix(123, 0), // will use system locale
+		TimeFieldN: time.Unix(123, 0), // will use system's locale
 	}
 
 	var actualValue A
@@ -985,7 +985,7 @@ func TestCustomDecodeNAndDefaultDecodeS(t *testing.T) {
 	}
 	expectedValue := A{
 		TimeFieldS: time.Unix(123, 10000000).UTC(),
-		TimeFieldN: time.Unix(123, 10000000), // will use system locale
+		TimeFieldN: time.Unix(123, 10000000), // will use system's locale
 	}
 
 	var actualValue A
diff --git a/feature/dynamodbstreams/attributevalue/marshaler_test.go b/feature/dynamodbstreams/attributevalue/marshaler_test.go
index 6ab440c6628..abf0484891b 100644
--- a/feature/dynamodbstreams/attributevalue/marshaler_test.go
+++ b/feature/dynamodbstreams/attributevalue/marshaler_test.go
@@ -1,6 +1,7 @@
 package attributevalue
 
 import (
+	"fmt"
 	"math"
 	"reflect"
 	"testing"
@@ -708,3 +709,10 @@ func Test_Encode_YAML_TagKey(t *testing.T) {
 
 	compareObjects(t, expected, actual)
 }
+
+func cmpDiff(e, a interface{}) string {
+	if !reflect.DeepEqual(e, a) {
+		return fmt.Sprintf("%v != %v", e, a)
+	}
+	return ""
+}
diff --git a/feature/dynamodbstreams/attributevalue/shared_test.go b/feature/dynamodbstreams/attributevalue/shared_test.go
index 86f3bb42b74..3a3721db420 100644
--- a/feature/dynamodbstreams/attributevalue/shared_test.go
+++ b/feature/dynamodbstreams/attributevalue/shared_test.go
@@ -424,10 +424,3 @@ func ptrToValue(in interface{}) interface{} {
 	}
 	return v.Interface()
 }
-
-func cmpDiff(e, a interface{}) string {
-	if !reflect.DeepEqual(e, a) {
-		return fmt.Sprintf("%v != %v", e, a)
-	}
-	return ""
-}