diff --git a/pyproject.toml b/pyproject.toml
index 4f2fc3c..d2a1a2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,3 +83,6 @@ extend-exclude = '''
   | alembic/versions
 )/
 '''
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
diff --git a/tests/conftest.py b/tests/conftest.py
index e2eaa2f..b78cb2c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,7 @@
 from typing import Generator
 
 import pytest
+import pytest_asyncio
 from fastapi.testclient import TestClient
 
 from app.database import Base
@@ -11,7 +12,7 @@ from app.main import app
 from tests.factories import _Session
 
 
-@pytest.fixture
+@pytest_asyncio.fixture
 async def async_db_session():
     async with async_session() as session:
         async with async_engine.begin() as conn:
diff --git a/tests/test_ldsig.py b/tests/test_ldsig.py
index d371994..62ea525 100644
--- a/tests/test_ldsig.py
+++ b/tests/test_ldsig.py
@@ -1,7 +1,12 @@
 from copy import deepcopy
 
+import httpx
+import pytest
+from respx import MockRouter
+
 from app import activitypub as ap
 from app import ldsig
+from app.database import AsyncSession
 from app.key import Key
 from tests import factories
 
@@ -28,7 +33,11 @@ _SAMPLE_CREATE = {
 }
 
 
-def test_linked_data_sig():
+@pytest.mark.asyncio
+async def test_linked_data_sig(
+    async_db_session: AsyncSession,
+    respx_mock: MockRouter,
+) -> None:
     privkey, pubkey = factories.generate_key()
     ra = factories.RemoteActorFactory(
         base_url="https://microblog.pub",
@@ -37,8 +46,9 @@ def test_linked_data_sig():
     )
     k = Key(ra.ap_id, f"{ra.ap_id}#main-key")
     k.load(privkey)
+    respx_mock.get(ra.ap_id).mock(return_value=httpx.Response(200, json=ra.ap_actor))
 
     doc = deepcopy(_SAMPLE_CREATE)
 
     ldsig.generate_signature(doc, k)
-    assert ldsig.verify_signature(doc, k)
+    assert (await ldsig.verify_signature(async_db_session, doc)) is True