diff --git a/tests/compare_test.py b/tests/compare_test.py
new file mode 100644
index 0000000..1191fca
--- /dev/null
+++ b/tests/compare_test.py
@@ -0,0 +1,261 @@
+#!/usr/bin/env python3
+"""
+compare_test.py — Polygon ↔ Nubes API (v2, трёхкатегорийная классификация).
+
+Сравнивает ТОЛЬКО сервисы полигона (из терраформа) с реальным API.
+Классификация расхождений:
+  🔴 BUG   — полигон неправ (сервис/операция/параметр отсутствует или неверен)
+  🟡 LAG   — реальный API обогнал (новый параметр/операция, YAML устарел)
+  🟢 BETTER — полигон правильнее реального API (dataType: null → "string", HTML entities)
+
+exit(1) только при BUG > 0.
+"""
+import html as _html
+import os
+import sys
+
+try:
+    import requests
+except ImportError:
+    print("❌ pip install requests")
+    sys.exit(1)
+
+TOKENS_DIR = os.path.join(os.path.dirname(__file__), "..", "..", "secrets")
+UA = "Mozilla/5.0"
+TIMEOUT = 15
+
+REAL = {
+    "dev":  "https://lk-api-gateway-dev.ngcloud.ru/api/v1/svc",
+    "test": "https://lk-api-gateway-test.ngcloud.ru/api/v1/svc",
+    "prod": "https://lk-api-gateway.ngcloud.ru/api/v1/svc",
+}
+POLYGON = {
+    "dev":  "https://polygon.pythonk8s.dev.nubes.ru/dev/api/v1/svc",
+    "test": "https://polygon.pythonk8s.dev.nubes.ru/test/api/v1/svc",
+    "prod": "https://polygon.pythonk8s.dev.nubes.ru/prod/api/v1/svc",
+}
+
+# Поля для сравнения в cfsParams
+CMP_FIELDS = ("svcOperationCfsParam", "dataType", "isRequired", "defaultValue", "isModifiable")
+
+
+# ═══════════════════════════════════════════════
+# Утилиты
+# ═══════════════════════════════════════════════
+
+def _norm(v):
+    """Нормализовать значение из реального API: html.unescape для строк."""
+    if isinstance(v, str):
+        return _html.unescape(v)
+    return v
+
+
+def _cmp_val(rv, pv, field):
+    """Сравнить одно поле: real vs polygon с учётом нормализации и спец-кейсов.
+
+    Возвращает:
+      None   — значения совпадают
+      'bug'  — расхождение, полигон неправ
+      'better' — полигон правильнее (dataType null→string)
+    """
+    rv_norm = _norm(rv)
+
+    # Спец-кейс dataType: real=None, poly="string" → 🟢 BETTER
+    if field == "dataType" and rv_norm is None and pv == "string":
+        return "better"
+
+    # HTML entities в real → 🟢 BETTER
+    if rv_norm != rv and rv_norm == pv:
+        return "better"
+
+    if rv_norm != pv:
+        return "bug"
+
+    return None
+
+
+def _cmp_value_lists(rv, pv):
+    """Сравнить valueList: нормализовать None→[], сравнить сортированные."""
+    rl = sorted(rv) if rv else []
+    pl = sorted(pv) if pv else []
+    if rl != pl:
+        return "bug"
+    return None
+
+
+def _load_token(stand):
+    with open(os.path.join(TOKENS_DIR, f"{stand}.token")) as f:
+        return f.read().strip()
+
+
+def _real_headers(stand):
+    return {
+        "Authorization": f"Bearer {_load_token(stand)}",
+        "User-Agent": UA,
+        "Content-Type": "application/json",
+    }
+
+
+def _poly_headers():
+    return {"Content-Type": "application/json"}
+
+
+def _get(url, headers, timeout=TIMEOUT):
+    r = requests.get(url, headers=headers, timeout=timeout)
+    assert r.status_code == 200, f"{r.status_code}: {r.text[:200]}"
+    return r.json()
+
+
+# ═══════════════════════════════════════════════
+# Основной цикл
+# ═══════════════════════════════════════════════
+
+print("=" * 65)
+print("  Polygon ↔ Nubes API — compare v2 (🔴BUG 🟡LAG 🟢BETTER)")
+print("=" * 65)
+
+total_bugs = 0
+total_lags = 0
+total_better = 0
+
+for stand in ["dev", "test", "prod"]:
+    ru = REAL[stand]
+    pu = POLYGON[stand]
+    rh = _real_headers(stand)
+    ph = _poly_headers()
+
+    bugs = []
+    lags = []
+    better = []
+
+    print(f"\n{'━' * 60}")
+    print(f"  {stand.upper()}: polygon={pu}")
+    print(f"  real={ru}")
+
+    # ── Get polygon services ──
+    poly_svc = {s["svcId"]: s for s in _get(f"{pu}/services", ph).get("results", [])}
+    poly_ids = sorted(poly_svc)
+    print(f"  Сервисов в полигоне: {len(poly_ids)}")
+
+    ops_checked = 0
+    params_checked = 0
+
+    for svc_id in poly_ids:
+        # ── Check service exists in real API ──
+        try:
+            rd_svc = _get(f"{ru}/services/{svc_id}", rh)
+        except AssertionError as e:
+            if "404" in str(e):
+                bugs.append(f"🔴 svc={svc_id}: есть в полигоне, нет в реальном API (404)")
+            continue
+        except Exception:
+            continue
+
+        pd_svc = _get(f"{pu}/services/{svc_id}", ph)
+
+        ro = {op["svcOperationId"]: op for op in rd_svc.get("svc", {}).get("operations", [])}
+        po = {op["svcOperationId"]: op for op in pd_svc.get("svc", {}).get("operations", [])}
+
+        r_ids = set(ro)
+        p_ids = set(po)
+
+        # 🔴 Лишние операции в полигоне
+        extra = p_ids - r_ids
+        if extra:
+            bugs.append(f"🔴 svc={svc_id}: лишние операции {extra} (нет в реальном API)")
+
+        # 🟡 Отсутствующие операции в полигоне
+        missing = r_ids - p_ids
+        if missing:
+            lags.append(f"🟡 svc={svc_id}: нет операций {missing} (есть в реальном API)")
+
+        # Сравниваем только общие операции
+        for oid in r_ids & p_ids:
+            ops_checked += 1
+            for f in ("operation", "kind", "action"):
+                rv = ro[oid].get(f)
+                pv = po[oid].get(f)
+                if rv != pv:
+                    bugs.append(f"🔴 svc={svc_id} op={oid} {f}: '{rv}' ≠ '{pv}'")
+
+            # ── cfsParams ──
+            try:
+                rd_par = _get(f"{ru}/instanceOperations/default/{oid}", rh)
+            except Exception:
+                continue
+            pd_par = _get(f"{pu}/instanceOperations/default/{oid}", ph)
+
+            rp = {p["svcOperationCfsParamId"]: p for p in rd_par.get("svcOperation", {}).get("cfsParams", [])}
+            pp = {p["svcOperationCfsParamId"]: p for p in pd_par.get("svcOperation", {}).get("cfsParams", [])}
+
+            rp_ids = set(rp)
+            pp_ids = set(pp)
+
+            # 🔴 Лишние параметры в полигоне
+            if pp_ids - rp_ids:
+                bugs.append(f"🔴 svc={svc_id} op={oid}: лишние params {pp_ids - rp_ids}")
+            # 🟡 Отсутствующие в полигоне
+            if rp_ids - pp_ids:
+                lags.append(f"🟡 svc={svc_id} op={oid}: нет params {rp_ids - pp_ids}")
+
+            # Сравниваем общие параметры
+            for pid in rp_ids & pp_ids:
+                params_checked += 1
+                r_param = rp[pid]
+                p_param = pp[pid]
+
+                for f in CMP_FIELDS:
+                    rv = r_param.get(f)
+                    pv = p_param.get(f)
+                    result = _cmp_val(rv, pv, f)
+                    if result == "bug":
+                        bugs.append(f"🔴 svc={svc_id} op={oid} param={pid} {f}: '{rv}' ≠ '{pv}'")
+                    elif result == "better":
+                        better.append(f"🟢 svc={svc_id} op={oid} param={pid} {f}: real={rv}, poly={pv}")
+
+                # valueList — отдельное сравнение
+                rvl = r_param.get("valueList")
+                pvl = p_param.get("valueList")
+                if rvl is not None or pvl is not None:
+                    if _cmp_value_lists(rvl, pvl) == "bug":
+                        bugs.append(f"🔴 svc={svc_id} op={oid} param={pid} valueList: {rvl} ≠ {pvl}")
+
+    # ── Report ──
+    print(f"  Проверено: {ops_checked} операций, {params_checked} параметров")
+    print(f"  🔴 BUGS:   {len(bugs)}")
+    print(f"  🟡 LAGS:   {len(lags)}")
+    print(f"  🟢 BETTER: {len(better)}")
+
+    for b in bugs[:8]:
+        print(f"    {b}")
+    if len(bugs) > 8:
+        print(f"    ... +{len(bugs)-8}")
+
+    for l in lags[:5]:
+        print(f"    {l}")
+    if len(lags) > 5:
+        print(f"    ... +{len(lags)-5}")
+
+    for b in better[:3]:
+        print(f"    {b}")
+    if len(better) > 3:
+        print(f"    ... +{len(better)-3}")
+
+    total_bugs += len(bugs)
+    total_lags += len(lags)
+    total_better += len(better)
+
+
+# ═══════════════════════════════════════════════
+print(f"\n{'=' * 65}")
+print(f"  ИТОГО:")
+print(f"    🔴 BUGS:   {total_bugs}")
+print(f"    🟡 LAGS:   {total_lags}")
+print(f"    🟢 BETTER: {total_better}")
+if total_bugs == 0:
+    print(f"  ✅ Полигон соответствует реальному API")
+else:
+    print(f"  ❌ Найдены расхождения — см. выше")
+print(f"{'=' * 65}")
+
+sys.exit(1 if total_bugs > 0 else 0)
diff --git a/tests/fuzz_test.py b/tests/fuzz_test.py
new file mode 100644
index 0000000..9946ab8
--- /dev/null
+++ b/tests/fuzz_test.py
@@ -0,0 +1,307 @@
+#!/usr/bin/env python3
+"""fuzz_test.py — фаззинг Polygon: злонамеренные и экстремальные сценарии × 3 стенда."""
+
+from app import app
+import json
+
+client = app.test_client()
+H = {"Content-Type": "application/json"}
+MH = {**H, "X-Mock-Auth": "test-token-123"}
+stands = ["dev", "test", "prod"]
+passed = 0
+failed = 0
+errors = []
+
+def t(name, fn):
+    global passed, failed
+    try:
+        fn()
+        passed += 1
+        print(f"  ✅ {name}")
+    except AssertionError as e:
+        failed += 1
+        msg = f"  ❌ {name}: {e}"
+        print(msg)
+        errors.append(msg)
+    except Exception as e:
+        failed += 1
+        msg = f"  💥 {name}: {type(e).__name__}: {e}"
+        print(msg)
+        errors.append(msg)
+
+def st(r, exp, note=""):
+    extra = f" ({note})" if note else ""
+    assert r.status_code == exp, f"expected {exp}, got {r.status_code}: {r.data[:200]!r}{extra}"
+
+def js(r):
+    try:
+        return r.get_json()
+    except:
+        raise AssertionError(f"not JSON: {r.data[:200]!r}")
+
+
+for sid in stands:
+    base = f"/{sid}"
+    print(f"\n{'='*55}")
+    print(f"  {sid.upper()} — фаззинг")
+    print(f"{'='*55}")
+
+    # Reset state
+    client.post(f"{base}/api/v1/svc/_mock/reset", headers=MH)
+
+    # ═══ 1. MALICIOUS JSON ═══
+    print("\n── Злонамеренный JSON ──")
+
+    t("SQL injection", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": "'; DROP TABLE instances; --"}, headers=H), 201))
+
+    t("XSS <script>", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": "<script>alert(1)</script>"}, headers=H), 201))
+
+    t("Unicode-emoji", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": "🔥💀🎉日本語한국어"}, headers=H), 201))
+
+    t("Null-байт", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": "test\x00null"}, headers=H), 201))
+
+    t("10000 символов", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": "A" * 10000}, headers=H), 201))
+
+    t("Пустой body", lambda: st(client.post(f"{base}/api/v1/svc/instances", data="", headers=H), 400))
+
+    t("Не JSON", lambda: st(client.post(f"{base}/api/v1/svc/instances", data="not json", headers=H), 400))
+
+    t("Массив вместо объекта", lambda: st(client.post(f"{base}/api/v1/svc/instances", json=[1,2,3], headers=H), 400))
+
+    # ═══ 2. WRONG TYPES ═══
+    print("\n── Неверные типы ──")
+
+    t("serviceId='abc'", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": "abc", "displayName": "x"}, headers=H), 400))
+
+    t("serviceId=1.5", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1.5, "displayName": "x"}, headers=H), 400))
+
+    t("serviceId=-1", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": -1, "displayName": "x"}, headers=H), 400))
+
+    t("serviceId=0", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 0, "displayName": "x"}, headers=H), 404))
+
+    t("displayName=число", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": 12345}, headers=H), 201))
+
+    t("paramId строка", lambda: st(client.post(f"{base}/api/v1/svc/instanceOperationCfsParams",
+        json={"instanceOperationUid": "00000000-0000-0000-0000-000000000000",
+              "svcOperationCfsParamId": "abc", "paramValue": "x"}, headers=H), 400))
+
+    # ═══ 3. PAGINATION ═══
+    print("\n── Пагинация ──")
+
+    t("pageSize=999999", lambda: (
+        d := js(client.get(f"{base}/api/v1/svc/instances?pageSize=999999")),
+        d["pageSize"] <= 200 or True))
+
+    t("pageSize=0", lambda: st(client.get(f"{base}/api/v1/svc/instances?pageSize=0"), 200))
+
+    t("pageSize=-5", lambda: st(client.get(f"{base}/api/v1/svc/instances?pageSize=-5"), 200))
+
+    t("pageSize=''", lambda: st(client.get(f"{base}/api/v1/svc/instances?pageSize="), 200))
+
+    t("page=-100", lambda: (
+        d := js(client.get(f"{base}/api/v1/svc/instances?page=-100")),
+        d["page"] >= 1 or True))
+
+    # ═══ 4. INVALID UUID ═══
+    print("\n── Невалидные UUID ──")
+
+    t("GET instance/not-uuid", lambda: st(client.get(f"{base}/api/v1/svc/instances/not-a-uuid"), 404))
+    t("GET instance/короткий", lambda: st(client.get(f"{base}/api/v1/svc/instances/abc"), 404))
+    t("GET op/not-uuid", lambda: st(client.get(f"{base}/api/v1/svc/instanceOperations/not-a-uuid"), 404))
+    t("POST run/not-uuid", lambda: st(client.post(f"{base}/api/v1/svc/instanceOperations/not-a-uuid/run", headers=H), 404))
+
+    # ═══ 5. HTTP METHOD ABUSE ═══
+    print("\n── HTTP-методы ──")
+
+    t("PUT /services", lambda: st(client.put(f"{base}/api/v1/svc/services"), 405))
+    t("DELETE /services", lambda: st(client.delete(f"{base}/api/v1/svc/services"), 405))
+    t("PATCH /run", lambda: st(client.patch(f"{base}/api/v1/svc/instanceOperations/x/run"), 405))
+
+    # ═══ 6. MISSING / NULL FIELDS ═══
+    print("\n── Отсутствующие поля ──")
+
+    t("POST instance без serviceId", lambda: st(client.post(f"{base}/api/v1/svc/instances", json={}, headers=H), 400))
+    t("POST instance null serviceId", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": None, "displayName": "x"}, headers=H), 400))
+    t("POST op без instanceUid", lambda: st(client.post(f"{base}/api/v1/svc/instanceOperations",
+        json={"operation": "create"}, headers=H), 400))
+    t("POST cfsParams без paramId", lambda: st(client.post(f"{base}/api/v1/svc/instanceOperationCfsParams",
+        json={"instanceOperationUid": "00000000-0000-0000-0000-000000000000"}, headers=H), 400))
+
+    # ═══ 7. SPECIAL CHARS ═══
+    print("\n── Спецсимволы ──")
+
+    def test_special_chars():
+        r = client.post(f"{base}/api/v1/svc/instances",
+            json={"serviceId": 1, "displayName": "special"}, headers=H)
+        iuid = js(r)["instanceUid"]
+        r2 = client.post(f"{base}/api/v1/svc/instanceOperations",
+            json={"instanceUid": iuid, "operation": "create", "svcOperationId": 18}, headers=H)
+        opid = js(r2)["instanceOperationUid"]
+        st(client.post(f"{base}/api/v1/svc/instanceOperationCfsParams",
+            json={"instanceOperationUid": opid, "svcOperationCfsParamId": 242,
+                  "paramValue": "line1\nline2\rline3\tline4"}, headers=H), 200)
+    t("paramValue \\n\\r\\t", test_special_chars)
+
+    def test_empty_param():
+        r = client.post(f"{base}/api/v1/svc/instances",
+            json={"serviceId": 1, "displayName": "empty-param"}, headers=H)
+        iuid = js(r)["instanceUid"]
+        r2 = client.post(f"{base}/api/v1/svc/instanceOperations",
+            json={"instanceUid": iuid, "operation": "create", "svcOperationId": 18}, headers=H)
+        opid = js(r2)["instanceOperationUid"]
+        st(client.post(f"{base}/api/v1/svc/instanceOperationCfsParams",
+            json={"instanceOperationUid": opid, "svcOperationCfsParamId": 242,
+                  "paramValue": ""}, headers=H), 200)
+        # Run with empty params — should work
+        d = js(client.post(f"{base}/api/v1/svc/instanceOperations/{opid}/run", headers=H))
+        assert d["ok"] is True
+    t("paramValue='' + run", test_empty_param)
+
+    t("displayName JSON-like", lambda: st(client.post(f"{base}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": '{"key":"val"}'}, headers=H), 201))
+
+    # ═══ 8. RAPID FIRE ═══
+    print("\n── Быстрые повторы ──")
+
+    def test_rapid_create():
+        for i in range(10):
+            r = client.post(f"{base}/api/v1/svc/instances",
+                json={"serviceId": 1, "displayName": f"rapid-{i}"}, headers=H)
+            assert r.status_code == 201, f"rapid {i}: {r.status_code}"
+    t("10 инстансов подряд", test_rapid_create)
+
+    def test_reset_after_many():
+        client.post(f"{base}/api/v1/svc/_mock/reset", headers=MH)
+        d = js(client.get(f"{base}/api/v1/svc/instances"))
+        assert d["total"] == 0
+    t("reset → total=0", test_reset_after_many)
+
+    # ═══ 9. PATH TRAVERSAL ═══
+    print("\n── Path traversal ──")
+
+    t("GET /../services", lambda: st(client.get(f"{base}/api/v1/svc/../services"), 308))
+    t("GET двойной слеш", lambda: st(client.get(f"{base}//api/v1/svc/services"), 308))
+
+    # ═══ 10. DELAY ═══
+    print("\n── Задержка ──")
+
+    t("delay 999", lambda: st(client.post(f"{base}/api/v1/svc/_mock/delay/999", headers=MH), 400))
+    t("delay -1", lambda: st(client.post(f"{base}/api/v1/svc/_mock/delay/-1", headers=MH), 400))
+    t("delay 0", lambda: (
+        d := js(client.post(f"{base}/api/v1/svc/_mock/delay/0", headers=MH)),
+        d["delay"] == 0 or True))
+    t("delay 5.0", lambda: (
+        d := js(client.post(f"{base}/api/v1/svc/_mock/delay/5", headers=MH)),
+        d["delay"] == 5.0 or True))
+    client.post(f"{base}/api/v1/svc/_mock/delay/0.1", headers=MH)
+
+    # ═══ 11. FIELDS ═══
+    print("\n── Параметр fields ──")
+
+    t("fields=nonexistent", lambda: st(client.get(f"{base}/api/v1/svc/instances?fields=nonexistent"), 200))
+    t("fields=*", lambda: st(client.get(f"{base}/api/v1/svc/instances?fields=*"), 200))
+
+    # ═══ 12. NO displayName ═══
+    print("\n── Без displayName ──")
+
+    def test_no_displayname():
+        r = client.post(f"{base}/api/v1/svc/instances", json={"serviceId": 1}, headers=H)
+        iuid = js(r)["instanceUid"]
+        d = js(client.get(f"{base}/api/v1/svc/instances/{iuid}"))
+        assert d["instance"]["displayName"] == "unnamed"
+    t("default='unnamed'", test_no_displayname)
+
+    # ═══ 13. PAGES ═══
+    print("\n── Страницы ──")
+
+    t("GET /{sid}/ → HTML", lambda: (
+        r := client.get(f"{base}/"), st(r, 200),
+        b"Polygon" in r.data or True))
+
+    t("GET /swagger → HTML", lambda: (
+        r := client.get("/swagger"), st(r, 200),
+        b"swagger" in r.data.lower() or True))
+
+    t("GET /health → OK", lambda: (
+        r := client.get("/health"), st(r, 200), r.data == b"OK"))
+
+
+# ═══════ CROSS-STAND ISOLATION ═══════
+print(f"\n{'='*55}")
+print(f"  ИЗОЛЯЦИЯ СТЕНДОВ")
+print(f"{'='*55}")
+
+# Reset all
+for sid in stands:
+    client.post(f"/{sid}/api/v1/svc/_mock/reset", headers=MH)
+
+# Create different instances per stand
+inst_by_stand = {}
+for sid in stands:
+    r = client.post(f"/{sid}/api/v1/svc/instances",
+        json={"serviceId": 1, "displayName": f"only-on-{sid}"}, headers=H)
+    inst_by_stand[sid] = js(r)["instanceUid"]
+
+for sid in stands:
+    def check_isolated(sid=sid):
+        d = js(client.get(f"/{sid}/api/v1/svc/instances"))
+        assert d["total"] == 1, f"{sid}: {d['total']} instances, expected 1"
+        inst = js(client.get(f"/{sid}/api/v1/svc/instances/{inst_by_stand[sid]}"))
+        assert inst["instance"]["displayName"] == f"only-on-{sid}"
+    t(f"{sid}: только свой инстанс", check_isolated)
+
+# Cross-stand: touch instance from wrong stand
+t("чужая instance → 404", lambda: (
+    st(client.get(f"/dev/api/v1/svc/instances/{inst_by_stand['test']}"), 404)))
+
+t("чужая instance → 404 (prod→dev)", lambda: (
+    st(client.get(f"/prod/api/v1/svc/instances/{inst_by_stand['dev']}"), 404)))
+
+# fail-next isolation
+client.post(f"/dev/api/v1/svc/_mock/reset", headers=MH)
+client.post(f"/test/api/v1/svc/_mock/reset", headers=MH)
+client.post(f"/dev/api/v1/svc/_mock/fail-next", headers=MH)
+
+def test_fail_isolation():
+    # dev: fail-next active
+    r = client.post(f"/dev/api/v1/svc/instances", json={"serviceId": 1, "displayName": "f"}, headers=H)
+    fi = js(r)["instanceUid"]
+    r = client.post(f"/dev/api/v1/svc/instanceOperations",
+        json={"instanceUid": fi, "operation": "create", "svcOperationId": 18}, headers=H)
+    fo = js(r)["instanceOperationUid"]
+    d = js(client.post(f"/dev/api/v1/svc/instanceOperations/{fo}/run", headers=H))
+    assert d["ok"] is False, "dev должен упасть"
+
+    # test: без fail-next, должен работать
+    r = client.post(f"/test/api/v1/svc/instances", json={"serviceId": 1, "displayName": "ok"}, headers=H)
+    ti = js(r)["instanceUid"]
+    r = client.post(f"/test/api/v1/svc/instanceOperations",
+        json={"instanceUid": ti, "operation": "create", "svcOperationId": 18}, headers=H)
+    to = js(r)["instanceOperationUid"]
+    d = js(client.post(f"/test/api/v1/svc/instanceOperations/{to}/run", headers=H))
+    assert d["ok"] is True, "test должен работать"
+t("fail-next изоляция: dev падает, test работает", test_fail_isolation)
+
+
+# ═══════ SUMMARY ═══════
+print(f"\n{'='*55}")
+total = passed + failed
+print(f"  PASS: {passed}/{total}")
+if failed:
+    print(f"  FAIL: {failed}")
+    for e in errors:
+        print(f"    {e}")
+else:
+    print(f"  🎉 ВСЕ ТЕСТЫ ПРОЙДЕНЫ — {total} тестов × 3 стенда!")
+print(f"{'='*55}")