diff --git a/tests/unit_tests/provider/test_localagent_inbound_attachments.py b/tests/unit_tests/provider/test_localagent_inbound_attachments.py
deleted file mode 100644
index bc7352f13..000000000
--- a/tests/unit_tests/provider/test_localagent_inbound_attachments.py
+++ /dev/null
@@ -1,146 +0,0 @@
-"""Unit tests for LocalAgentRunner._inject_inbound_attachments.
-
-Covers the user -> sandbox attachment path added for the Box attachment
-round-trip:
-
-* materialized descriptors are stashed on the query and described to the model
-  via an appended text note (in-sandbox paths + outbox convention);
-* non-image file parts (file_base64 / file_url) are stripped from the user
-  message content because OpenAI-compatible chat models reject them, while
-  image and text parts are kept for vision models;
-* the helper is a no-op when the box service is unavailable or yields nothing,
-  and never raises into the chat turn on materialization failure.
-"""
-
-from __future__ import annotations
-
-from types import SimpleNamespace
-from unittest.mock import AsyncMock, Mock
-
-import pytest
-
-import langbot_plugin.api.entities.builtin.provider.message as provider_message
-
-from langbot.pkg.provider.runners.localagent import LocalAgentRunner
-
-
-def _make_runner(box_service) -> LocalAgentRunner:
-    runner = LocalAgentRunner.__new__(LocalAgentRunner)
-    runner.ap = SimpleNamespace(logger=Mock(), box_service=box_service)
-    return runner
-
-
-def _make_query():
-    return SimpleNamespace(variables={}, query_id='q-123')
-
-
-def _box_service(attachments):
-    svc = SimpleNamespace(
-        available=True,
-        OUTBOX_MOUNT_DIR='/outbox',
-        materialize_inbound_attachments=AsyncMock(return_value=attachments),
-    )
-    return svc
-
-
-@pytest.mark.asyncio
-async def test_inject_strips_file_parts_and_appends_note():
-    box = _box_service([{'type': 'Voice', 'path': '/inbox/q-123/voice.wav', 'size': 176000}])
-    runner = _make_runner(box)
-    query = _make_query()
-    user_message = provider_message.Message(
-        role='user',
-        content=[
-            provider_message.ContentElement.from_text('transcribe this'),
-            provider_message.ContentElement.from_file_base64('data:audio/wav;base64,AAAA', 'voice.wav'),
-        ],
-    )
-
-    await runner._inject_inbound_attachments(query, user_message)
-
-    types = [getattr(ce, 'type', None) for ce in user_message.content]
-    # file_base64 dropped; text kept; sandbox-path note appended as text
-    assert 'file_base64' not in types
-    assert types.count('text') == 2
-    note = user_message.content[-1].text
-    assert '/inbox/q-123/voice.wav' in note
-    assert '/outbox/q-123' in note
-    # descriptors stashed for downstream stages
-    assert query.variables['_sandbox_inbound_attachments'] == box.materialize_inbound_attachments.return_value
-
-
-@pytest.mark.asyncio
-async def test_inject_keeps_image_parts():
-    box = _box_service([{'type': 'Image', 'path': '/inbox/q-123/pic.png', 'size': 1234}])
-    runner = _make_runner(box)
-    query = _make_query()
-    user_message = provider_message.Message(
-        role='user',
-        content=[
-            provider_message.ContentElement.from_text('what is this'),
-            provider_message.ContentElement.from_image_base64('data:image/png;base64,iVBORw0K'),
-        ],
-    )
-
-    await runner._inject_inbound_attachments(query, user_message)
-
-    types = [getattr(ce, 'type', None) for ce in user_message.content]
-    assert 'image_base64' in types  # vision part preserved
-    assert types[-1] == 'text'  # note appended last
-
-
-@pytest.mark.asyncio
-async def test_inject_promotes_string_content_to_list_with_note():
-    box = _box_service([{'type': 'File', 'path': '/inbox/q-123/data.csv', 'size': 42}])
-    runner = _make_runner(box)
-    query = _make_query()
-    user_message = provider_message.Message(role='user', content='clean this csv')
-
-    await runner._inject_inbound_attachments(query, user_message)
-
-    assert isinstance(user_message.content, list)
-    assert [getattr(ce, 'type', None) for ce in user_message.content] == ['text', 'text']
-    assert user_message.content[0].text == 'clean this csv'
-    assert '/inbox/q-123/data.csv' in user_message.content[1].text
-
-
-@pytest.mark.asyncio
-async def test_inject_noop_without_box_service():
-    runner = _make_runner(box_service=None)
-    query = _make_query()
-    user_message = provider_message.Message(role='user', content='hello')
-
-    await runner._inject_inbound_attachments(query, user_message)
-
-    assert user_message.content == 'hello'
-    assert '_sandbox_inbound_attachments' not in query.variables
-
-
-@pytest.mark.asyncio
-async def test_inject_noop_when_no_attachments():
-    box = _box_service([])
-    runner = _make_runner(box)
-    query = _make_query()
-    user_message = provider_message.Message(role='user', content='hello')
-
-    await runner._inject_inbound_attachments(query, user_message)
-
-    assert user_message.content == 'hello'
-    assert '_sandbox_inbound_attachments' not in query.variables
-
-
-@pytest.mark.asyncio
-async def test_inject_swallows_materialization_error():
-    box = SimpleNamespace(
-        available=True,
-        OUTBOX_MOUNT_DIR='/outbox',
-        materialize_inbound_attachments=AsyncMock(side_effect=RuntimeError('disk full')),
-    )
-    runner = _make_runner(box)
-    query = _make_query()
-    user_message = provider_message.Message(role='user', content='hello')
-
-    # must not raise
-    await runner._inject_inbound_attachments(query, user_message)
-    assert user_message.content == 'hello'
-    runner.ap.logger.warning.assert_called_once()