diff --git a/.github/workflows/pr-release.yml b/.github/workflows/pr-release.yml
new file mode 100644
index 0000000..62d1f7d
--- /dev/null
+++ b/.github/workflows/pr-release.yml
@@ -0,0 +1,40 @@
+name: Build test image
+on:
+  pull_request:
+    types: [ labeled ]
+env:
+  REGISTRY: harbor.clyso.com
+jobs:
+  # build and publish docker images
+  docker:
+    if: ${{ github.event.label.name == 'test' }}
+    strategy:
+      matrix:
+        service:
+          - worker
+          - proxy
+          - agent
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Docker Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/chorus/${{ matrix.service }}:${{ github.head_ref || github.ref_name }}
+          build-args: |
+            GIT_TAG=${{ github.ref_name }}
+            GIT_COMMIT=${{ github.sha }}
+            SERVICE=${{ matrix.service }}
diff --git a/service/worker/handler/migration_bucket_list_obj_handler.go b/service/worker/handler/migration_bucket_list_obj_handler.go
index 2f8694e..7fc8fd8 100644
--- a/service/worker/handler/migration_bucket_list_obj_handler.go
+++ b/service/worker/handler/migration_bucket_list_obj_handler.go
@@ -21,6 +21,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"strings"
 
 	xctx "github.com/clyso/chorus/pkg/ctx"
 	"github.com/clyso/chorus/pkg/dom"
@@ -74,7 +75,7 @@ func (s *svc) HandleMigrationBucketListObj(ctx context.Context, t *asynq.Task) e
 			return fmt.Errorf("migration bucket list obj: list objects error %w", object.Err)
 		}
 		objectsNum++
-		isDir := object.Size == 0 && object.ContentType == "" && object.ETag == "" && object.LastModified.IsZero()
+		isDir := object.Size == 0 && strings.HasSuffix(object.Key, "/")
 		logger.Debug().Str(log.Object, object.Key).Str("obj_version_id", object.VersionID).Bool("is_dir", isDir).Msg("migration bucket list obj: start processing object from the list")
 		if isDir {
 			subP := p