diff --git a/server/src/controllers/asset-upload.controller.spec.ts b/server/src/controllers/asset-upload.controller.spec.ts
index c94b29cc54..10ad929561 100644
--- a/server/src/controllers/asset-upload.controller.spec.ts
+++ b/server/src/controllers/asset-upload.controller.spec.ts
@@ -115,7 +115,20 @@ describe(AssetUploadController.name, () => {
       expect(body).toEqual(expect.objectContaining({ message: 'Expected valid upload-complete header' }));
     });
 
-    it('should infer upload length from non-empty content length if complete upload', async () => {
+    it('should require Upload-Length header for incomplete upload', async () => {
+      const { status, body } = await request(ctx.getHttpServer())
+        .post('/upload')
+        .set('Upload-Draft-Interop-Version', '8')
+        .set('X-Immich-Asset-Data', makeAssetData())
+        .set('Repr-Digest', checksum)
+        .set('Upload-Complete', '?0')
+        .send(buffer);
+
+      expect(status).toBe(400);
+      expect(body).toEqual(expect.objectContaining({ message: 'Missing upload-length header' }));
+    });
+
+    it('should infer upload length from content length if complete upload', async () => {
       const { status } = await request(ctx.getHttpServer())
         .post('/upload')
         .set('Upload-Draft-Interop-Version', '8')