diff --git a/aws/awss3/awss3_test.go b/aws/awss3/awss3_test.go
index 3e48156..c1ced0e 100644
--- a/aws/awss3/awss3_test.go
+++ b/aws/awss3/awss3_test.go
@@ -21,7 +21,6 @@ import (
 
 	"github.com/88labs/go-utils/aws/awsconfig"
 	"github.com/88labs/go-utils/aws/awss3"
-	"github.com/88labs/go-utils/aws/awss3/options/global/s3dialer"
 	"github.com/88labs/go-utils/aws/awss3/options/s3download"
 	"github.com/88labs/go-utils/aws/awss3/options/s3head"
 	"github.com/88labs/go-utils/aws/awss3/options/s3list"
@@ -893,41 +892,3 @@ func TestSelectCSVHeaders(t *testing.T) {
 		assert.Error(t, err)
 	})
 }
-
-func TestGlobalOptionWithHeadObject(t *testing.T) {
-	ctx := ctxawslocal.WithContext(
-		context.Background(),
-		ctxawslocal.WithS3Endpoint("http://127.0.0.1:29000"), // use Minio
-		ctxawslocal.WithAccessKey("DUMMYACCESSKEYEXAMPLE"),
-		ctxawslocal.WithSecretAccessKey("DUMMYSECRETKEYEXAMPLE"),
-	)
-	s3Client, err := awss3.GetClient(ctx, TestRegion)
-	assert.NoError(t, err)
-
-	createFixture := func(fileSize int) awss3.Key {
-		key := fmt.Sprintf("awstest/%s.txt", ulid.MustNew())
-		uploader := manager.NewUploader(s3Client)
-		input := s3.PutObjectInput{
-			Body:    bytes.NewReader(bytes.Repeat([]byte{1}, fileSize)),
-			Bucket:  aws.String(TestBucket),
-			Key:     aws.String(key),
-			Expires: aws.Time(time.Now().Add(10 * time.Minute)),
-		}
-		if _, err := uploader.Upload(ctx, &input); err != nil {
-			assert.NoError(t, err)
-		}
-		return awss3.Key(key)
-	}
-
-	t.Run("If the option is specified", func(t *testing.T) {
-		key := createFixture(100)
-		dialer := s3dialer.NewConfGlobalDialer()
-		dialer.WithTimeout(time.Second)
-		dialer.WithKeepAlive(2 * time.Second)
-		dialer.WithDeadline(time.Now().Add(time.Second))
-		awss3.GlobalDialer = dialer
-		res, err := awss3.HeadObject(ctx, TestRegion, TestBucket, key)
-		assert.NoError(t, err)
-		assert.Equal(t, int64(100), res.ContentLength)
-	})
-}
diff --git a/aws/awss3/options/global/global_test.go b/aws/awss3/options/global/global_test.go
new file mode 100644
index 0000000..5eb8fdf
--- /dev/null
+++ b/aws/awss3/options/global/global_test.go
@@ -0,0 +1,62 @@
+package global_test
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/88labs/go-utils/aws/awsconfig"
+	"github.com/88labs/go-utils/aws/awss3"
+	"github.com/88labs/go-utils/aws/awss3/options/global/s3dialer"
+	"github.com/88labs/go-utils/aws/ctxawslocal"
+	"github.com/88labs/go-utils/ulid"
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	TestBucket = "test"
+	TestRegion = awsconfig.RegionTokyo
+)
+
+func TestGlobalOptionWithHeadObject(t *testing.T) {
+	ctx := ctxawslocal.WithContext(
+		context.Background(),
+		ctxawslocal.WithS3Endpoint("http://127.0.0.1:29000"), // use Minio
+		ctxawslocal.WithAccessKey("DUMMYACCESSKEYEXAMPLE"),
+		ctxawslocal.WithSecretAccessKey("DUMMYSECRETKEYEXAMPLE"),
+	)
+	s3Client, err := awss3.GetClient(ctx, TestRegion)
+	assert.NoError(t, err)
+
+	createFixture := func(fileSize int) awss3.Key {
+		key := fmt.Sprintf("awstest/%s.txt", ulid.MustNew())
+		uploader := manager.NewUploader(s3Client)
+		input := s3.PutObjectInput{
+			Body:    bytes.NewReader(bytes.Repeat([]byte{1}, fileSize)),
+			Bucket:  aws.String(TestBucket),
+			Key:     aws.String(key),
+			Expires: aws.Time(time.Now().Add(10 * time.Minute)),
+		}
+		if _, err := uploader.Upload(ctx, &input); err != nil {
+			assert.NoError(t, err)
+		}
+		return awss3.Key(key)
+	}
+
+	t.Run("If the option is specified", func(t *testing.T) {
+		key := createFixture(100)
+		dialer := s3dialer.NewConfGlobalDialer()
+		dialer.WithTimeout(time.Second)
+		dialer.WithKeepAlive(2 * time.Second)
+		dialer.WithDeadline(time.Now().Add(time.Second))
+		awss3.GlobalDialer = dialer
+		res, err := awss3.HeadObject(ctx, TestRegion, TestBucket, key)
+		assert.NoError(t, err)
+		assert.Equal(t, int64(100), res.ContentLength)
+	})
+}