diff --git a/api/tests/test_app.py b/api/tests/test_app.py
index 59f6401..76cdaec 100644
--- a/api/tests/test_app.py
+++ b/api/tests/test_app.py
@@ -18,6 +18,7 @@ import pytest
 from fastapi import Request
 from fastapi.routing import APIRoute
 from loguru import logger
+from pydantic import SecretStr
 
 from src.api.router import router
 from src.core.config import Settings
@@ -66,6 +67,30 @@ async def test_healthcheck_subjects(client: httpx.AsyncClient, monkeypatch: pyte
     assert "jwt" not in str(body).lower()
 
 
+@pytest.mark.parametrize("enabled", [False, True], ids=["when_nats_off", "when_nats_down"])
+async def test_healthcheck_returns_non_default_subjects_without_jwt(
+    client: httpx.AsyncClient, monkeypatch: pytest.MonkeyPatch, enabled: bool
+):
+    """T3.1: отдаются именно настроенные (не умолчательные) subject'ы; непустой JWT в тело не попадает."""
+    jwt = "JWTVALUEMARK"
+    nats = app_module.settings.OPENBAO.NATS
+    monkeypatch.setattr(app_module.settings, "NATS_ENABLED", enabled)
+    monkeypatch.setattr(nats, "NATS_TABULAR_REQUEST_SUBJECT", "env.files.tabular_uploaded")
+    monkeypatch.setattr(nats, "NATS_IMAGE_REQUEST_SUBJECT", "env.files.img_uploaded")
+    monkeypatch.setattr(nats, "NATS_RESULT_SUBJECT", "env.files.tabular_parsed")
+    monkeypatch.setattr(nats, "NATS_JWT", SecretStr(jwt))
+    assert nats.NATS_JWT.get_secret_value() == jwt
+
+    response = await client.get("/healthcheck")
+
+    assert response.json()["subjects"] == {
+        "tabular_request": "env.files.tabular_uploaded",
+        "image_request": "env.files.img_uploaded",
+        "result": "env.files.tabular_parsed",
+    }
+    assert jwt not in response.text
+
+
 async def test_healthcheck_nats_down_when_enabled_without_connection(
     client: httpx.AsyncClient, monkeypatch: pytest.MonkeyPatch
 ):
@@ -239,6 +264,26 @@ async def test_lifespan_does_not_wait_for_nats_and_healthcheck_is_down(monkeypat
     assert not nats.is_connected
 
 
+@pytest.mark.usefixtures("_no_smb")
+async def test_lifespan_logs_nats_subjects_at_start(monkeypatch: pytest.MonkeyPatch):
+    """Tasks 1.2: при старте в лог пишутся используемые subject'ы NATS."""
+    records: list[Any] = []
+    handler_id = logger.add(lambda message: records.append(message.record), level="INFO")
+    monkeypatch.setattr(app_module, "_connect_s3", _unavailable_s3)
+    monkeypatch.setattr(app_module, "_create_nats", lambda: None)
+    monkeypatch.setattr(app_module.settings.OPENBAO.NATS, "NATS_RESULT_SUBJECT", "env.files.tabular_parsed")
+    try:
+        async with app_module.lifespan(app_module.app):
+            pass
+    finally:
+        logger.remove(handler_id)
+
+    messages = [r["message"] for r in records if "Subject'ы NATS" in r["message"]]
+    assert len(messages) == 1
+    assert "env.files.tabular_parsed" in messages[0]
+    assert "files.tabular_uploaded" in messages[0]
+
+
 def test_create_nats_disabled_returns_none(monkeypatch: pytest.MonkeyPatch):
     monkeypatch.setattr(app_module.settings, "NATS_ENABLED", False)
     assert app_module._create_nats() is None
diff --git a/api/tests/test_config.py b/api/tests/test_config.py
index 36a30ce..aeba221 100644
--- a/api/tests/test_config.py
+++ b/api/tests/test_config.py
@@ -184,18 +184,44 @@ def test_nats_subjects_from_openbao(settings_from_env) -> None:
     assert nats.NATS_RESULT_SUBJECT == "test.files.tabular_parsed"
 
 
+SUBJECT_KEYS = ("NATS_TABULAR_REQUEST_SUBJECT", "NATS_IMAGE_REQUEST_SUBJECT", "NATS_RESULT_SUBJECT")
+
+
+@pytest.mark.parametrize("key", SUBJECT_KEYS)
 @pytest.mark.parametrize(
     "value",
     ["", "files.*", "files.>", ">", "files..tabular", ".files", "files.", "files tabular", "files.tabular_uploaded "],
 )
-def test_invalid_subject_rejected(settings_from_env, value: str) -> None:
-    with pytest.raises(ValidationError, match="NATS_RESULT_SUBJECT"):
-        settings_from_env(OPENBAO__NATS__NATS_RESULT_SUBJECT=value)
+def test_invalid_subject_rejected(settings_from_env, key: str, value: str) -> None:
+    with pytest.raises(ValidationError, match=key):
+        settings_from_env(**{f"OPENBAO__NATS__{key}": value})
 
 
-def test_equal_subjects_rejected(settings_from_env) -> None:
-    with pytest.raises(ValidationError, match="NATS_TABULAR_REQUEST_SUBJECT и NATS_RESULT_SUBJECT совпадают"):
-        settings_from_env(OPENBAO__NATS__NATS_RESULT_SUBJECT="files.tabular_uploaded")
+@pytest.mark.parametrize(
+    ("first", "second"),
+    [
+        ("NATS_TABULAR_REQUEST_SUBJECT", "NATS_IMAGE_REQUEST_SUBJECT"),
+        ("NATS_TABULAR_REQUEST_SUBJECT", "NATS_RESULT_SUBJECT"),
+        ("NATS_IMAGE_REQUEST_SUBJECT", "NATS_RESULT_SUBJECT"),
+    ],
+)
+def test_equal_subjects_rejected(settings_from_env, first: str, second: str) -> None:
+    with pytest.raises(ValidationError, match=f"{first} и {second} совпадают"):
+        settings_from_env(**{f"OPENBAO__NATS__{first}": "files.same", f"OPENBAO__NATS__{second}": "files.same"})
+
+
+def test_invalid_subject_error_hides_nats_secrets(settings_from_env) -> None:
+    """Ошибка валидации subject'а при заданных JWT/seed не печатает их (маркеры короткие, см. тест ниже)."""
+    jwt_mark, seed_mark = "JWTMARK", "SEEDMARK"
+    with pytest.raises(ValidationError) as exc_info:
+        settings_from_env(
+            OPENBAO__NATS__NATS_JWT=jwt_mark,
+            OPENBAO__NATS__NATS_SEED=seed_mark,
+            OPENBAO__NATS__NATS_RESULT_SUBJECT="files.*",
+        )
+    assert "NATS_RESULT_SUBJECT" in str(exc_info.value)
+    assert jwt_mark not in str(exc_info.value)
+    assert seed_mark not in str(exc_info.value)
 
 
 def test_nats_secrets_hidden_in_repr(settings_from_env) -> None:
diff --git a/api/tests/test_nats_core.py b/api/tests/test_nats_core.py
index 60b8e44..e1614a9 100644
--- a/api/tests/test_nats_core.py
+++ b/api/tests/test_nats_core.py
@@ -393,3 +393,18 @@ def test_connection_subscribes_to_configured_result_subject() -> None:
     nats = NATSSettings(NATS_URL="nats://x:4222", NATS_RESULT_SUBJECT="test.files.tabular_parsed")
     assert NatsConnection(nats).result_subject == "test.files.tabular_parsed"
     assert NatsConnection(nats, result_subject="override").result_subject == "override"
+
+
+async def test_connection_subscribes_with_configured_result_subject() -> None:
+    """T3.2: subscribe вызывается с subject'ом из настроек (без override) и группой очереди."""
+    nats = NATSSettings(NATS_URL="nats://x:4222", NATS_RESULT_SUBJECT="test.files.tabular_parsed")
+    world = _FakeWorld()
+    conn = NatsConnection(nats, client_factory=world, sleep=_RecordingSleep(), queue="g")
+    await conn.start()
+    assert await conn.wait_ready(timeout=2)
+
+    await conn.subscribe_results(_handler)
+
+    subscription = world.clients[-1].subscriptions[0]
+    assert (subscription["subject"], subscription["queue"]) == ("test.files.tabular_parsed", "g")
+    await conn.stop()
diff --git a/openspec/changes/nats-env-config/tasks.md b/openspec/changes/nats-env-config/tasks.md
index de04193..81fbfed 100644
--- a/openspec/changes/nats-env-config/tasks.md
+++ b/openspec/changes/nats-env-config/tasks.md
@@ -1,18 +1,18 @@
 ## 1. Тесты
 
-- [ ] 1.1 Unit: умолчания subject'ов, чтение `OPENBAO__NATS__NATS_*_SUBJECT`, отказ на `*`/`>`/пробеле/пустом токене и
+- [x] 1.1 Unit: умолчания subject'ов, чтение `OPENBAO__NATS__NATS_*_SUBJECT`, отказ на `*`/`>`/пробеле/пустом токене и
   совпадающих именах; `SecretStr` для `NATS_JWT`/`NATS_SEED`, отсутствие значений в ошибке валидации и `repr`
-- [ ] 1.2 Unit: `/healthcheck.subjects` (`tabular_request`, `image_request`, `result`) при `nats = ok | down | off`; лог старта с subject'ами
+- [x] 1.2 Unit: `/healthcheck.subjects` (`tabular_request`, `image_request`, `result`) при `nats = ok | down | off`; лог старта с subject'ами
 - [ ] 1.3 Интеграционный тест: приложение с subject'ами окружения публикует запрос и подписано на ответ по ним
 
 ## 2. Реализация
 
-- [ ] 2.1 `core/config.py`: поля и валидация `NATSSettings`, `SecretStr`, `hide_input_in_errors=True`
-- [ ] 2.2 Колбэки nkeys — `get_secret_value()`
-- [ ] 2.3 Подписка и публикация по настройкам; константы `contract/subjects.py` — умолчания
-- [ ] 2.4 `/healthcheck.subjects`, лог при старте
+- [x] 2.1 `core/config.py`: поля и валидация `NATSSettings`, `SecretStr`, `hide_input_in_errors=True`
+- [x] 2.2 Колбэки nkeys — `get_secret_value()`
+- [x] 2.3 Подписка и публикация по настройкам; константы `contract/subjects.py` — умолчания
+- [x] 2.4 `/healthcheck.subjects`, лог при старте
 
 ## 3. Документы
 
-- [ ] 3.1 `api/.env.example`, README (переменные NATS, `/healthcheck`)
+- [x] 3.1 `api/.env.example`, README (переменные NATS, `/healthcheck`)
 - [ ] 3.2 `make check-full` зелёный