diff --git a/packages/backend/test/unit/misc/gen-key-pair.ts b/packages/backend/test/unit/misc/gen-key-pair.ts
index 771147d299..9d76c68009 100644
--- a/packages/backend/test/unit/misc/gen-key-pair.ts
+++ b/packages/backend/test/unit/misc/gen-key-pair.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as crypto from 'node:crypto';
 import { genRSAAndEd25519KeyPair } from '@/misc/gen-key-pair.js';