diff --git a/cmd/csaf_downloader/forwarder_test.go b/cmd/csaf_downloader/forwarder_test.go
new file mode 100644
index 00000000..61d18f93
--- /dev/null
+++ b/cmd/csaf_downloader/forwarder_test.go
@@ -0,0 +1,26 @@
+// This file is Free Software under the MIT License
+// without warranty, see README.md and LICENSES/MIT.txt for details.
+//
+// SPDX-License-Identifier: MIT
+//
+// 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 "testing"
+
+func TestValidationStatusUpdate(t *testing.T) {
+	sv := validValidationStatus
+	sv.update(invalidValidationStatus)
+	sv.update(validValidationStatus)
+	if sv != invalidValidationStatus {
+		t.Fatalf("got %q expected %q", sv, invalidValidationStatus)
+	}
+	sv = notValidatedValidationStatus
+	sv.update(validValidationStatus)
+	sv.update(notValidatedValidationStatus)
+	if sv != notValidatedValidationStatus {
+		t.Fatalf("got %q expected %q", sv, notValidatedValidationStatus)
+	}
+}