diff --git a/src/search.js b/src/search.js
index c8f2ec7..9d02f48 100644
--- a/src/search.js
+++ b/src/search.js
@@ -212,6 +212,7 @@ export default async (req, res) => {
     searchFile = req.rawBody;
   } else if (req.method === "HEAD") {
     await logAndDequeue(knex, redis, uid, priority, 204);
+    // Note: the client side can not recive the json object because of HEAD
     return res.status(204).json({
       error: "HEAD method acknowledged",
     });
diff --git a/src/search.test.js b/src/search.test.js
index dc7db69..69f138c 100644
--- a/src/search.test.js
+++ b/src/search.test.js
@@ -612,7 +612,6 @@ describe("invalid input", () => {
     async () => {
       const response = await request(app).head("/search");
       expect(response.statusCode).toBe(204);
-      expect(typeof response.body.error).toBe("string");
     },
     1000 * 10
   );