diff --git a/.github/workflows/linux_test.yml b/.github/workflows/linux_test.yml
index b97d8db..6b79af0 100644
--- a/.github/workflows/linux_test.yml
+++ b/.github/workflows/linux_test.yml
@@ -39,7 +39,21 @@ jobs:
       - name: Download dependencies
         run: go mod download
 
+      - name: Set up AWS credentials
+        run: |
+          echo "[default]" > $HOME/.aws/credentials
+          echo "aws_access_key_id=${{ secrets.AWS_ACCESS_KEY_ID }}" >> $HOME/.aws/credentials
+          echo "aws_secret_access_key=${{ secrets.AWS_SECRET_ACCESS_KEY }}" >> $HOME/.aws/credentials
+
+      - name: Set up AWS config
+        run: |
+          echo "[default]" > $HOME/.aws/config
+          echo "region=us-east-1" >> $HOME/.aws/config
+          echo "output=json" >> $HOME/.aws/config
+          echo "endpoint_url=http://localhost:4566" >> $HOME/.aws/config
+
       - uses: nao1215/actions-hottest@v1
         with:
           args: '-cover -coverpkg=./... -coverprofile=coverage.out ./...'
+
       - uses: k1LoW/octocov-action@v0
diff --git a/app/external/s3_helper_test.go b/app/external/s3_helper_test.go
new file mode 100644
index 0000000..08d77ae
--- /dev/null
+++ b/app/external/s3_helper_test.go
@@ -0,0 +1,53 @@
+package external
+
+import (
+	"context"
+	"testing"
+
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+	"github.com/nao1215/rainbow/app/domain/model"
+)
+
+func s3client(t *testing.T) *s3.Client {
+	t.Helper()
+	config, err := model.NewAWSConfig(context.Background(), model.NewAWSProfile(""), model.RegionAPNortheast1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	client, err := NewS3Client(config)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return client
+}
+
+func deleteAllS3BucketDelete(t *testing.T, client *s3.Client) {
+	t.Helper()
+
+	buckets, err := client.ListBuckets(context.Background(), &s3.ListBucketsInput{})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, bucket := range buckets.Buckets {
+		if _, err := client.DeleteBucket(context.Background(), &s3.DeleteBucketInput{Bucket: bucket.Name}); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func existS3Bucket(t *testing.T, client *s3.Client, bucket model.Bucket) bool {
+	t.Helper()
+
+	buckets, err := client.ListBuckets(context.Background(), &s3.ListBucketsInput{})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for _, b := range buckets.Buckets {
+		if *b.Name == bucket.String() {
+			return true
+		}
+	}
+	return false
+}
diff --git a/app/external/s3_test.go b/app/external/s3_test.go
new file mode 100644
index 0000000..8749df6
--- /dev/null
+++ b/app/external/s3_test.go
@@ -0,0 +1,38 @@
+// Package external implements the external service.
+package external
+
+import (
+	"context"
+	"testing"
+
+	"github.com/nao1215/rainbow/app/domain/model"
+	"github.com/nao1215/rainbow/app/domain/service"
+)
+
+func TestS3BucketCreator_CreateS3Bucket(t *testing.T) {
+	deleteAllS3BucketDelete(t, s3client(t))
+
+	t.Run("success to create bucket", func(t *testing.T) {
+		config, err := model.NewAWSConfig(context.Background(), model.NewAWSProfile(""), model.RegionAPNortheast1)
+		if err != nil {
+			t.Fatal(err)
+		}
+		client, err := NewS3Client(config)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		s3BucketCreator := NewS3BucketCreator(client)
+		input := &service.S3BucketCreatorInput{
+			Bucket: model.Bucket("test-bucket"),
+			Region: model.RegionAPNortheast1,
+		}
+		if _, err = s3BucketCreator.CreateS3Bucket(context.Background(), input); err != nil {
+			t.Error(err)
+		}
+
+		if !existS3Bucket(t, client, input.Bucket) {
+			t.Errorf("%s bucket does not exist", input.Bucket)
+		}
+	})
+}
diff --git a/compose.yml b/compose.yml
index 40286d1..0ac6dd4 100644
--- a/compose.yml
+++ b/compose.yml
@@ -11,6 +11,8 @@ services:
       - DOCKER_HOST=unix:///var/run/docker.sock
       - DNS_NAME_PATTERNS_TO_RESOLVE_UPSTREAM='.*cloudfront\.net'
       - CLOUDFRONT_STATIC_PORTS= 1
+      - AWS_ACCESS_KEY_ID=test
+      - AWS_SECRET_ACCESS_KEY=test
     volumes:
       - "${LOCALSTACK_VOLUME_DIR:-./localstack}:/var/lib/localstack"
       - "/var/run/docker.sock:/var/run/docker.sock"