diff --git a/upload/frontend/test_upload_frontend.mjs b/upload/frontend/test_upload_frontend.mjs
index 389cef5..0d2533b 100644
--- a/upload/frontend/test_upload_frontend.mjs
+++ b/upload/frontend/test_upload_frontend.mjs
@@ -2,6 +2,7 @@
 // Запуск: node upload/frontend/test_upload_frontend.mjs
 
 import assert from 'node:assert/strict';
+import { deflateRawSync } from 'node:zlib';
 
 // ── Полифилл File (Node 18 не имеет global File) ──
 if (typeof globalThis.File === 'undefined') {
@@ -105,6 +106,72 @@ function makeZip(entries) {
   return Buffer.concat(chunks);
 }
 
+// ── Сборка ZIP с методом 8 (deflate) — для проверки inflateRaw ──
+async function deflateRaw(bytes) {
+  // zlib.deflateRawSync — deflate без zlib-заголовка (то, что ждёт inflateRaw)
+  return deflateRawSync(Buffer.from(bytes));
+}
+
+async function makeZipDeflate(entries) {
+  const enc = new TextEncoder();
+  const chunks = [];
+  const central = [];
+  let offset = 0;
+  const utf8Flag = 0x0800;
+  for (const e of entries) {
+    const nameB = enc.encode(e.name);
+    const raw = enc.encode(e.data);
+    const comp = await deflateRaw(raw);
+    const crc = crc32(raw);
+    const lh = new DataView(new ArrayBuffer(30));
+    lh.setUint32(0, 0x04034b50, true);
+    lh.setUint16(4, 20, true);
+    lh.setUint16(6, utf8Flag, true);
+    lh.setUint16(8, 8, true);  // method 8 deflate
+    lh.setUint16(10, 0, true);
+    lh.setUint16(12, 0x21, true);
+    lh.setUint32(14, crc, true);
+    lh.setUint32(18, comp.length, true);
+    lh.setUint32(22, raw.length, true);
+    lh.setUint16(26, nameB.length, true);
+    lh.setUint16(28, 0, true);
+    chunks.push(Buffer.from(lh.buffer), Buffer.from(nameB), Buffer.from(comp));
+    const cd = new DataView(new ArrayBuffer(46));
+    cd.setUint32(0, 0x02014b50, true);
+    cd.setUint16(4, 20, true);
+    cd.setUint16(6, 20, true);
+    cd.setUint16(8, utf8Flag, true);
+    cd.setUint16(10, 8, true);
+    cd.setUint16(12, 0, true);
+    cd.setUint16(14, 0x21, true);
+    cd.setUint32(16, crc, true);
+    cd.setUint32(20, comp.length, true);
+    cd.setUint32(24, raw.length, true);
+    cd.setUint16(28, nameB.length, true);
+    cd.setUint16(30, 0, true);
+    cd.setUint16(32, 0, true);
+    cd.setUint16(34, 0, true);
+    cd.setUint16(36, 0, true);
+    cd.setUint32(38, 0, true);
+    cd.setUint32(42, offset, true);
+    central.push(Buffer.from(cd.buffer), Buffer.from(nameB));
+    offset += 30 + nameB.length + comp.length;
+  }
+  const cdSize = central.reduce((s, x) => s + x.byteLength, 0);
+  const cdStart = offset;
+  const eocd = new DataView(new ArrayBuffer(22));
+  eocd.setUint32(0, 0x06054b50, true);
+  eocd.setUint16(4, 0, true);
+  eocd.setUint16(6, 0, true);
+  eocd.setUint16(8, entries.length, true);
+  eocd.setUint16(10, entries.length, true);
+  eocd.setUint32(12, cdSize, true);
+  eocd.setUint32(16, cdStart, true);
+  eocd.setUint16(20, 0, true);
+  chunks.push(...central, Buffer.from(eocd.buffer));
+  return Buffer.concat(chunks);
+}
+
 // ── Тесты decodeZipName ──
 function testDecodeZipName() {
   const utf8 = new TextEncoder().encode('договор.pdf');
@@ -147,6 +214,23 @@ async function testZipNonDoc() {
   console.log('  не-doc фильтр: ok');
 }
 
+async function testZipDeflate() {
+  // deflate-raw требует DecompressionStream('deflate-raw') — в браузере есть, в Node 18 нет
+  let supported = true;
+  try { new DecompressionStream('deflate-raw'); } catch (e) { supported = false; }
+  if (!supported) {
+    console.log('  zip deflate (метод 8): skip — Node 18 не поддерживает deflate-raw');
+    return;
+  }
+  const content = 'Hello deflate world '.repeat(50);
+  const zip = await makeZipDeflate([{ name: 'deflated.txt', data: content }]);
+  const files = await listZipFiles(new File([zip], 'a.zip'), ALLOWED);
+  assert.equal(files.length, 1);
+  assert.equal(files[0].name, 'deflated.txt');
+  assert.equal(await files[0].text(), content);
+  console.log('  zip deflate (метод 8): ok');
+}
+
 async function testParseZipNotZip() {
   await assert.rejects(() => parseZip(new Uint8Array([1, 2, 3])), /Не ZIP/);
   console.log('  не-ZIP бросок: ok');
@@ -231,6 +315,7 @@ const TESTS = [
   ['zip кириллица', testZipCyrillic],
   ['вложенный zip', testZipNested],
   ['не-doc фильтр', testZipNonDoc],
+  ['zip deflate (метод 8)', testZipDeflate],
   ['не-ZIP бросок', testParseZipNotZip],
   ['дедуп/суффиксы', testDedup],
   ['лимиты over', testLimits],