diff --git a/api/tests/test_auth_refresh_http.py b/api/tests/test_auth_refresh_http.py
index 05f33ed..c36efc7 100644
--- a/api/tests/test_auth_refresh_http.py
+++ b/api/tests/test_auth_refresh_http.py
@@ -14,7 +14,7 @@ from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
 
 from app.core.config import settings
 from app.core.db import get_async_db, utc_now
-from app.core.dependencies import get_sms_sender
+from app.core.dependencies import get_object_storage, get_sms_sender
 from app.features.auth import repo
 from app.features.auth.router import router as auth_router
 from tests.conftest import install_test_error_handlers
@@ -33,6 +33,7 @@ async def refresh_http_app(
     app.include_router(auth_router)
     app.dependency_overrides[get_async_db] = _override_db
     app.dependency_overrides[get_sms_sender] = lambda: MagicMock()
+    app.dependency_overrides[get_object_storage] = lambda: MagicMock()
     return app
 
 
diff --git a/api/tests/test_http_router_error_contract.py b/api/tests/test_http_router_error_contract.py
index d6c114b..10d77c9 100644
--- a/api/tests/test_http_router_error_contract.py
+++ b/api/tests/test_http_router_error_contract.py
@@ -8,6 +8,7 @@ import pytest
 from fastapi import FastAPI
 from httpx import ASGITransport, AsyncClient
 
+from app.core.dependencies import get_object_storage
 from app.core.errors import BadRequestError, NotFoundError
 from app.features.auth.deps import get_auth_service
 from app.features.auth.router import router as auth_router
@@ -21,6 +22,7 @@ from tests.conftest import install_test_error_handlers
 async def test_auth_register_validation_returns_unified_422() -> None:
     app = install_test_error_handlers(FastAPI())
     app.include_router(auth_router)
+    app.dependency_overrides[get_object_storage] = lambda: MagicMock()
 
     transport = ASGITransport(app=app, raise_app_exceptions=False)
     async with AsyncClient(transport=transport, base_url="http://test") as client:
diff --git a/api/tests/test_ws_pipeline_transactional.py b/api/tests/test_ws_pipeline_transactional.py
index d7c3619..ba73adf 100644
--- a/api/tests/test_ws_pipeline_transactional.py
+++ b/api/tests/test_ws_pipeline_transactional.py
@@ -133,10 +133,18 @@ async def test_record_human_ai_turn_with_segment_postgres_flush_order() -> None:
     if not settings.database_url.startswith("postgresql"):
         pytest.skip("requires PostgreSQL")
 
+    from sqlalchemy import text
+
     from app.core.db import AsyncSessionLocal, transactional
     from app.features.conversation.models import Conversation
     from app.features.user.models import User
 
+    try:
+        async with AsyncSessionLocal() as db:
+            await db.execute(text("SELECT 1"))
+    except Exception:
+        pytest.skip("PostgreSQL not reachable")
+
     uid = str(uuid.uuid4())
     cid = str(uuid.uuid4())
     sid = str(uuid.uuid4())