diff --git a/cmd/csaf_downloader/downloader_test.go b/cmd/csaf_downloader/downloader_test.go
new file mode 100644
index 0000000..dac2e18
--- /dev/null
+++ b/cmd/csaf_downloader/downloader_test.go
@@ -0,0 +1,32 @@
+// This file is Free Software under the Apache-2.0 License
+// without warranty, see README.md and LICENSES/Apache-2.0.txt for details.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// SPDX-FileCopyrightText: 2023 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
+// Software-Engineering: 2023 Intevation GmbH <https://intevation.de>
+
+package main
+
+import (
+	"context"
+	"log/slog"
+	"testing"
+
+	"github.com/csaf-poc/csaf_distribution/v3/csaf"
+	"github.com/csaf-poc/csaf_distribution/v3/internal/options"
+)
+
+func TestShaMarking(t *testing.T) {
+	cfg := config{LogLevel: &options.LogLevel{Level: slog.LevelDebug}}
+	cfg.prepare()
+	d, err := newDownloader(&cfg)
+	if err != nil {
+		t.Fatalf("could not init downloader: %v", err)
+	}
+	defer d.close()
+	ctx := context.Background()
+	files := []csaf.AdvisoryFile{}
+
+	d.downloadFiles(ctx, csaf.TLPLabelWhite, files)
+}