diff --git a/app/activitypub.py b/app/activitypub.py
index 8e2a1f1..80e5201 100644
--- a/app/activitypub.py
+++ b/app/activitypub.py
@@ -327,17 +327,18 @@ def remove_context(raw_object: RawObject) -> RawObject:
     return a
 
 
-def post(url: str, payload: dict[str, Any]) -> httpx.Response:
+async def post(url: str, payload: dict[str, Any]) -> httpx.Response:
     check_url(url)
 
-    resp = httpx.post(
-        url,
-        headers={
-            "User-Agent": config.USER_AGENT,
-            "Content-Type": config.AP_CONTENT_TYPE,
-        },
-        json=payload,
-        auth=auth,
-    )
+    async with httpx.AsyncClient() as client:
+        resp = await client.post(
+            url,
+            headers={
+                "User-Agent": config.USER_AGENT,
+                "Content-Type": config.AP_CONTENT_TYPE,
+            },
+            json=payload,
+            auth=auth,
+        )
     resp.raise_for_status()
     return resp
diff --git a/app/actor.py b/app/actor.py
index 3761fc5..0e611e7 100644
--- a/app/actor.py
+++ b/app/actor.py
@@ -157,7 +157,12 @@ async def save_actor(db_session: AsyncSession, ap_actor: ap.RawObject) -> "Actor
     return actor
 
 
-async def fetch_actor(db_session: AsyncSession, actor_id: str) -> "ActorModel":
+async def fetch_actor(
+    db_session: AsyncSession,
+    actor_id: str,
+) -> Union["ActorModel", RemoteActor]:
+    if actor_id == LOCAL_ACTOR.ap_id:
+        return LOCAL_ACTOR
     from app import models
 
     existing_actor = (
diff --git a/app/incoming_activities.py b/app/incoming_activities.py
index 6a365d3..da1bf26 100644
--- a/app/incoming_activities.py
+++ b/app/incoming_activities.py
@@ -13,8 +13,8 @@ from app import ldsig
 from app import models
 from app.boxes import save_to_inbox
 from app.database import AsyncSession
-from app.database import async_session
 from app.utils.datetime import now
+from app.utils.workers import Worker
 
 _MAX_RETRIES = 8
 
@@ -67,11 +67,15 @@ def _set_next_try(
         outgoing_activity.next_try = next_try or _exp_backoff(outgoing_activity.tries)
 
 
-async def process_next_incoming_activity(db_session: AsyncSession) -> bool:
+async def fetch_next_incoming_activity(
+    db_session: AsyncSession,
+    in_flight: set[int],
+) -> models.IncomingActivity | None:
     where = [
         models.IncomingActivity.next_try <= now(),
         models.IncomingActivity.is_errored.is_(False),
         models.IncomingActivity.is_processed.is_(False),
+        models.IncomingActivity.id.not_in(in_flight),
     ]
     q_count = await db_session.scalar(
         select(func.count(models.IncomingActivity.id)).where(*where)
@@ -80,7 +84,7 @@ async def process_next_incoming_activity(db_session: AsyncSession) -> bool:
         logger.info(f"{q_count} incoming activities ready to process")
     if not q_count:
         # logger.debug("No activities to process")
-        return False
+        return None
 
     next_activity = (
         await db_session.execute(
@@ -91,6 +95,13 @@ async def process_next_incoming_activity(db_session: AsyncSession) -> bool:
         )
     ).scalar_one()
 
+    return next_activity
+
+
+async def process_next_incoming_activity(
+    db_session: AsyncSession,
+    next_activity: models.IncomingActivity,
+) -> None:
     logger.info(
         f"incoming_activity={next_activity.ap_object}/"
         f"{next_activity.sent_by_ap_actor_id}"
@@ -99,35 +110,45 @@ async def process_next_incoming_activity(db_session: AsyncSession) -> bool:
     next_activity.tries = next_activity.tries + 1
     next_activity.last_try = now()
 
-    try:
-        async with db_session.begin_nested():
-            await save_to_inbox(
-                db_session,
-                next_activity.ap_object,
-                next_activity.sent_by_ap_actor_id,
-            )
-    except Exception:
-        logger.exception("Failed")
-        next_activity.error = traceback.format_exc()
-        _set_next_try(next_activity)
-    else:
-        logger.info("Success")
-        next_activity.is_processed = True
+    if next_activity.ap_object and next_activity.sent_by_ap_actor_id:
+        try:
+            async with db_session.begin_nested():
+                await save_to_inbox(
+                    db_session,
+                    next_activity.ap_object,
+                    next_activity.sent_by_ap_actor_id,
+                )
+        except Exception:
+            logger.exception("Failed")
+            next_activity.error = traceback.format_exc()
+            _set_next_try(next_activity)
+        else:
+            logger.info("Success")
+            next_activity.is_processed = True
+
+    # FIXME: webmention support
 
     await db_session.commit()
-    return True
+    return None
+
+
+class IncomingActivityWorker(Worker[models.IncomingActivity]):
+    async def process_message(
+        self,
+        db_session: AsyncSession,
+        next_activity: models.IncomingActivity,
+    ) -> None:
+        await process_next_incoming_activity(db_session, next_activity)
+
+    async def get_next_message(
+        self,
+        db_session: AsyncSession,
+    ) -> models.IncomingActivity | None:
+        return await fetch_next_incoming_activity(db_session, self.in_flight_ids())
 
 
 async def loop() -> None:
-    async with async_session() as db_session:
-        while 1:
-            try:
-                await process_next_incoming_activity(db_session)
-            except Exception:
-                logger.exception("Failed to process next incoming activity")
-                raise
-
-            await asyncio.sleep(1)
+    await IncomingActivityWorker(workers_count=1).run_forever()
 
 
 if __name__ == "__main__":
diff --git a/app/models.py b/app/models.py
index b2472c7..b04f6b6 100644
--- a/app/models.py
+++ b/app/models.py
@@ -320,7 +320,7 @@ class IncomingActivity(Base):
     ap_id = Column(String, nullable=True, index=True)
     ap_object: Mapped[ap.RawObject] = Column(JSON, nullable=True)
 
-    tries = Column(Integer, nullable=False, default=0)
+    tries: Mapped[int] = Column(Integer, nullable=False, default=0)
     next_try = Column(DateTime(timezone=True), nullable=True, default=now)
 
     last_try = Column(DateTime(timezone=True), nullable=True)
diff --git a/app/outgoing_activities.py b/app/outgoing_activities.py
index ae2f5c0..9f08de6 100644
--- a/app/outgoing_activities.py
+++ b/app/outgoing_activities.py
@@ -1,3 +1,4 @@
+import asyncio
 import email
 import time
 import traceback
@@ -8,7 +9,6 @@ import httpx
 from loguru import logger
 from sqlalchemy import func
 from sqlalchemy import select
-from sqlalchemy.orm import Session
 from sqlalchemy.orm import joinedload
 
 from app import activitypub as ap
@@ -19,10 +19,10 @@ from app.actor import LOCAL_ACTOR
 from app.actor import _actor_hash
 from app.config import KEY_PATH
 from app.database import AsyncSession
-from app.database import SessionLocal
 from app.key import Key
 from app.utils.datetime import now
 from app.utils.url import check_url
+from app.utils.workers import Worker
 
 _MAX_RETRIES = 16
 
@@ -50,7 +50,9 @@ def _is_local_actor_updated() -> bool:
     return True
 
 
-def _send_actor_update_if_needed(db_session: Session) -> None:
+async def _send_actor_update_if_needed(
+    db_session: AsyncSession,
+) -> None:
     """The process for sending an update for the local actor is done here as
     in production, we may have multiple uvicorn worker and this worker will
     always run in a single process."""
@@ -59,9 +61,9 @@ def _send_actor_update_if_needed(db_session: Session) -> None:
 
     logger.info("Will send an Update for the local actor")
 
-    from app.boxes import RemoteObject
     from app.boxes import allocate_outbox_id
     from app.boxes import outbox_object_id
+    from app.boxes import save_outbox_object
 
     update_activity_id = allocate_outbox_id()
     update_activity = {
@@ -72,30 +74,15 @@ def _send_actor_update_if_needed(db_session: Session) -> None:
         "actor": config.ID,
         "object": ap.remove_context(LOCAL_ACTOR.ap_actor),
     }
-    ro = RemoteObject(update_activity, actor=LOCAL_ACTOR)
-    outbox_object = models.OutboxObject(
-        public_id=update_activity_id,
-        ap_type=ro.ap_type,
-        ap_id=ro.ap_id,
-        ap_context=ro.ap_context,
-        ap_object=ro.ap_object,
-        visibility=ro.visibility,
-        og_meta=None,
-        relates_to_inbox_object_id=None,
-        relates_to_outbox_object_id=None,
-        relates_to_actor_id=None,
-        activity_object_ap_id=LOCAL_ACTOR.ap_id,
-        is_hidden_from_homepage=True,
-        source=None,
+    outbox_object = await save_outbox_object(
+        db_session, update_activity_id, update_activity
     )
-    db_session.add(outbox_object)
-    db_session.flush()
 
     # Send the update to the followers collection and all the actor we have ever
     # contacted
     followers = (
         (
-            db_session.scalars(
+            await db_session.scalars(
                 select(models.Follower).options(joinedload(models.Follower.actor))
             )
         )
@@ -107,19 +94,17 @@ def _send_actor_update_if_needed(db_session: Session) -> None:
         for follower in followers
     } | {
         row.recipient
-        for row in db_session.execute(
+        for row in await db_session.execute(
             select(func.distinct(models.OutgoingActivity.recipient).label("recipient"))
         )
     }:  # type: ignore
-        outgoing_activity = models.OutgoingActivity(
+        await new_outgoing_activity(
+            db_session,
             recipient=rcp,
             outbox_object_id=outbox_object.id,
-            inbox_object_id=None,
         )
 
-        db_session.add(outgoing_activity)
-
-    db_session.commit()
+    await db_session.commit()
 
 
 async def new_outgoing_activity(
@@ -183,50 +168,65 @@ def _set_next_try(
         outgoing_activity.next_try = next_try or _exp_backoff(outgoing_activity.tries)
 
 
-def process_next_outgoing_activity(db: Session) -> bool:
+async def fetch_next_outgoing_activity(
+    db_session: AsyncSession,
+    in_fligh: set[int],
+) -> models.OutgoingActivity | None:
     where = [
         models.OutgoingActivity.next_try <= now(),
         models.OutgoingActivity.is_errored.is_(False),
         models.OutgoingActivity.is_sent.is_(False),
+        models.OutgoingActivity.id.not_in(in_fligh),
     ]
-    q_count = db.scalar(select(func.count(models.OutgoingActivity.id)).where(*where))
+    q_count = await db_session.scalar(
+        select(func.count(models.OutgoingActivity.id)).where(*where)
+    )
     if q_count > 0:
         logger.info(f"{q_count} outgoing activities ready to process")
     if not q_count:
         # logger.debug("No activities to process")
-        return False
+        return None
 
-    next_activity = db.execute(
-        select(models.OutgoingActivity)
-        .where(*where)
-        .limit(1)
-        .options(
-            joinedload(models.OutgoingActivity.inbox_object),
-            joinedload(models.OutgoingActivity.outbox_object),
+    next_activity = (
+        await db_session.execute(
+            select(models.OutgoingActivity)
+            .where(*where)
+            .limit(1)
+            .options(
+                joinedload(models.OutgoingActivity.inbox_object),
+                joinedload(models.OutgoingActivity.outbox_object),
+            )
+            .order_by(models.OutgoingActivity.next_try)
         )
-        .order_by(models.OutgoingActivity.next_try)
     ).scalar_one()
+    return next_activity
 
-    next_activity.tries = next_activity.tries + 1
+
+async def process_next_outgoing_activity(
+    db_session: AsyncSession,
+    next_activity: models.OutgoingActivity,
+) -> None:
+    next_activity.tries = next_activity.tries + 1  # type: ignore
     next_activity.last_try = now()
 
     logger.info(f"recipient={next_activity.recipient}")
 
     try:
-        if next_activity.webmention_target:
+        if next_activity.webmention_target and next_activity.outbox_object:
             webmention_payload = {
                 "source": next_activity.outbox_object.url,
                 "target": next_activity.webmention_target,
             }
             logger.info(f"{webmention_payload=}")
             check_url(next_activity.recipient)
-            resp = httpx.post(
-                next_activity.recipient,
-                data=webmention_payload,
-                headers={
-                    "User-Agent": config.USER_AGENT,
-                },
-            )
+            async with httpx.AsyncClient() as client:
+                resp = await client.post(
+                    next_activity.recipient,  # type: ignore
+                    data=webmention_payload,
+                    headers={
+                        "User-Agent": config.USER_AGENT,
+                    },
+                )
             resp.raise_for_status()
         else:
             payload = ap.wrap_object_if_needed(next_activity.anybox_object.ap_object)
@@ -238,12 +238,12 @@ def process_next_outgoing_activity(db: Session) -> bool:
                 "Delete",
             ]:
                 # But only if the object is public (to help with deniability/privacy)
-                if next_activity.outbox_object.visibility == ap.VisibilityEnum.PUBLIC:
+                if next_activity.outbox_object.visibility == ap.VisibilityEnum.PUBLIC:  # type: ignore  # noqa: E501
                     ldsig.generate_signature(payload, k)
 
             logger.info(f"{payload=}")
 
-            resp = ap.post(next_activity.recipient, payload)
+            resp = await ap.post(next_activity.recipient, payload)  # type: ignore
     except httpx.HTTPStatusError as http_error:
         logger.exception("Failed")
         next_activity.last_status_code = http_error.response.status_code
@@ -273,22 +273,31 @@ def process_next_outgoing_activity(db: Session) -> bool:
         next_activity.last_status_code = resp.status_code
         next_activity.last_response = resp.text
 
-    db.commit()
-    return True
+    await db_session.commit()
+    return None
 
 
-def loop() -> None:
-    db = SessionLocal()
-    _send_actor_update_if_needed(db)
-    while 1:
-        try:
-            process_next_outgoing_activity(db)
-        except Exception:
-            logger.exception("Failed to process next outgoing activity")
-            raise
+class OutgoingActivityWorker(Worker[models.OutgoingActivity]):
+    async def process_message(
+        self,
+        db_session: AsyncSession,
+        next_activity: models.OutgoingActivity,
+    ) -> None:
+        await process_next_outgoing_activity(db_session, next_activity)
 
-        time.sleep(1)
+    async def get_next_message(
+        self,
+        db_session: AsyncSession,
+    ) -> models.OutgoingActivity | None:
+        return await fetch_next_outgoing_activity(db_session, self.in_flight_ids())
+
+    async def startup(self, db_session: AsyncSession) -> None:
+        await _send_actor_update_if_needed(db_session)
+
+
+async def loop() -> None:
+    await OutgoingActivityWorker(workers_count=3).run_forever()
 
 
 if __name__ == "__main__":
-    loop()
+    asyncio.run(loop())
diff --git a/app/utils/opengraph.py b/app/utils/opengraph.py
index 6a66fe1..7308859 100644
--- a/app/utils/opengraph.py
+++ b/app/utils/opengraph.py
@@ -7,6 +7,7 @@ import httpx
 from bs4 import BeautifulSoup  # type: ignore
 from pydantic import BaseModel
 
+from loguru import logger
 from app import ap_object
 from app import config
 from app.actor import LOCAL_ACTOR
@@ -64,7 +65,7 @@ async def external_urls(
     for tag in ro.tags:
         if tag_href := tag.get("href"):
             tags_hrefs.add(tag_href)
-        if tag.get("type") == "Mention" and tag["name"] != LOCAL_ACTOR.handle:
+        if tag.get("type") == "Mention":
             mentioned_actor = await fetch_actor(db_session, tag["href"])
             tags_hrefs.add(mentioned_actor.url)
             tags_hrefs.add(mentioned_actor.ap_id)
diff --git a/docs/templates/layout.html b/docs/templates/layout.html
index f398f3c..65860ea 100644
--- a/docs/templates/layout.html
+++ b/docs/templates/layout.html
@@ -93,6 +93,7 @@ footer {
             <li><a href="https://sr.ht/~tsileo/microblog.pub/">Source code</a>
             <li><a href="https://todo.sr.ht/~tsileo/microblog.pub">Bug tracker</a>
             <li><a href="https://sr.ht/~tsileo/microblog.pub/lists">Mailing list</a>
+            <li><a href="https://github.com/tsileo/microblog.pub">GitHub mirror</a>
         </ul>
     </nav>
 
diff --git a/tasks.py b/tasks.py
index 5a6818f..e2e47b6 100644
--- a/tasks.py
+++ b/tasks.py
@@ -68,7 +68,7 @@ def process_outgoing_activities(ctx):
     # type: (Context) -> None
     from app.outgoing_activities import loop
 
-    loop()
+    asyncio.run(loop())
 
 
 @task
diff --git a/tests/test_inbox.py b/tests/test_inbox.py
index c3efc1e..73aded9 100644
--- a/tests/test_inbox.py
+++ b/tests/test_inbox.py
@@ -12,6 +12,8 @@ from app import activitypub as ap
 from app import models
 from app.actor import LOCAL_ACTOR
 from app.ap_object import RemoteObject
+from app.database import AsyncSession
+from app.incoming_activities import fetch_next_incoming_activity
 from app.incoming_activities import process_next_incoming_activity
 from tests import factories
 from tests.utils import mock_httpsig_checker
@@ -21,6 +23,12 @@ from tests.utils import setup_remote_actor
 from tests.utils import setup_remote_actor_as_follower
 
 
+async def _process_next_incoming_activity(db_session: AsyncSession) -> None:
+    next_activity = await fetch_next_incoming_activity(db_session, set())
+    assert next_activity
+    await process_next_incoming_activity(db_session, next_activity)
+
+
 def test_inbox_requires_httpsig(
     client: TestClient,
 ):
@@ -64,7 +72,7 @@ def test_inbox_incoming_follow_request(
     # Then the server returns a 204
     assert response.status_code == 202
 
-    run_async(process_next_incoming_activity)
+    run_async(_process_next_incoming_activity)
 
     # And the actor was saved in DB
     saved_actor = db.execute(select(models.Actor)).scalar_one()
@@ -122,7 +130,7 @@ def test_inbox_incoming_follow_request__manually_approves_followers(
     assert response.status_code == 202
 
     with mock.patch("app.boxes.MANUALLY_APPROVES_FOLLOWERS", True):
-        run_async(process_next_incoming_activity)
+        run_async(_process_next_incoming_activity)
 
     # And the actor was saved in DB
     saved_actor = db.execute(select(models.Actor)).scalar_one()
@@ -177,7 +185,7 @@ def test_inbox_accept_follow_request(
     # Then the server returns a 204
     assert response.status_code == 202
 
-    run_async(process_next_incoming_activity)
+    run_async(_process_next_incoming_activity)
 
     # And the Accept activity was saved in the inbox
     inbox_activity = db.execute(select(models.InboxObject)).scalar_one()
@@ -224,7 +232,7 @@ def test_inbox__create_from_follower(
     assert response.status_code == 202
 
     # And when processing the incoming activity
-    run_async(process_next_incoming_activity)
+    run_async(_process_next_incoming_activity)
 
     # Then the Create activity was saved
     create_activity_from_inbox: models.InboxObject | None = db.execute(
@@ -278,7 +286,7 @@ def test_inbox__create_already_deleted_object(
     assert response.status_code == 202
 
     # And when processing the incoming activity
-    run_async(process_next_incoming_activity)
+    run_async(_process_next_incoming_activity)
 
     # Then the Create activity was saved
     create_activity_from_inbox: models.InboxObject | None = db.execute(
@@ -334,7 +342,7 @@ def test_inbox__actor_is_blocked(
     assert response.status_code == 202
 
     # And when processing the incoming activity from a blocked actor
-    run_async(process_next_incoming_activity)
+    run_async(_process_next_incoming_activity)
 
     # Then the Create activity was discarded
     assert (
diff --git a/tests/test_process_outgoing_activities.py b/tests/test_process_outgoing_activities.py
index a0c303a..8b6e951 100644
--- a/tests/test_process_outgoing_activities.py
+++ b/tests/test_process_outgoing_activities.py
@@ -5,13 +5,13 @@ import pytest
 import respx
 from fastapi.testclient import TestClient
 from sqlalchemy import select
-from sqlalchemy.orm import Session
 
 from app import models
 from app.actor import LOCAL_ACTOR
 from app.ap_object import RemoteObject
 from app.database import AsyncSession
 from app.outgoing_activities import _MAX_RETRIES
+from app.outgoing_activities import fetch_next_outgoing_activity
 from app.outgoing_activities import new_outgoing_activity
 from app.outgoing_activities import process_next_outgoing_activity
 from tests import factories
@@ -65,15 +65,18 @@ async def test_new_outgoing_activity(
     assert outgoing_activity.recipient == inbox_url
 
 
-def test_process_next_outgoing_activity__no_next_activity(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__no_next_activity(
     respx_mock: respx.MockRouter,
+    async_db_session: AsyncSession,
 ) -> None:
-    assert process_next_outgoing_activity(db) is False
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity is None
 
 
-def test_process_next_outgoing_activity__server_200(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__server_200(
+    async_db_session: AsyncSession,
     respx_mock: respx.MockRouter,
 ) -> None:
     # And an outgoing activity
@@ -91,19 +94,24 @@ def test_process_next_outgoing_activity__server_200(
 
     # When processing the next outgoing activity
     # Then it is processed
-    assert process_next_outgoing_activity(db) is True
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity
+    await process_next_outgoing_activity(async_db_session, next_activity)
 
     assert respx_mock.calls.call_count == 1
 
-    outgoing_activity = db.query(models.OutgoingActivity).one()
+    outgoing_activity = (
+        await async_db_session.execute(select(models.OutgoingActivity))
+    ).scalar_one()
     assert outgoing_activity.is_sent is True
     assert outgoing_activity.last_status_code == 204
     assert outgoing_activity.error is None
     assert outgoing_activity.is_errored is False
 
 
-def test_process_next_outgoing_activity__webmention(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__webmention(
+    async_db_session: AsyncSession,
     respx_mock: respx.MockRouter,
 ) -> None:
     # And an outgoing activity
@@ -121,19 +129,24 @@ def test_process_next_outgoing_activity__webmention(
 
     # When processing the next outgoing activity
     # Then it is processed
-    assert process_next_outgoing_activity(db) is True
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity
+    await process_next_outgoing_activity(async_db_session, next_activity)
 
     assert respx_mock.calls.call_count == 1
 
-    outgoing_activity = db.query(models.OutgoingActivity).one()
+    outgoing_activity = (
+        await async_db_session.execute(select(models.OutgoingActivity))
+    ).scalar_one()
     assert outgoing_activity.is_sent is True
     assert outgoing_activity.last_status_code == 204
     assert outgoing_activity.error is None
     assert outgoing_activity.is_errored is False
 
 
-def test_process_next_outgoing_activity__error_500(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__error_500(
+    async_db_session: AsyncSession,
     respx_mock: respx.MockRouter,
 ) -> None:
     outbox_object = _setup_outbox_object()
@@ -152,11 +165,15 @@ def test_process_next_outgoing_activity__error_500(
 
     # When processing the next outgoing activity
     # Then it is processed
-    assert process_next_outgoing_activity(db) is True
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity
+    await process_next_outgoing_activity(async_db_session, next_activity)
 
     assert respx_mock.calls.call_count == 1
 
-    outgoing_activity = db.query(models.OutgoingActivity).one()
+    outgoing_activity = (
+        await async_db_session.execute(select(models.OutgoingActivity))
+    ).scalar_one()
     assert outgoing_activity.is_sent is False
     assert outgoing_activity.last_status_code == 500
     assert outgoing_activity.last_response == "oops"
@@ -164,8 +181,9 @@ def test_process_next_outgoing_activity__error_500(
     assert outgoing_activity.tries == 1
 
 
-def test_process_next_outgoing_activity__errored(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__errored(
+    async_db_session: AsyncSession,
     respx_mock: respx.MockRouter,
 ) -> None:
     outbox_object = _setup_outbox_object()
@@ -185,22 +203,28 @@ def test_process_next_outgoing_activity__errored(
 
     # When processing the next outgoing activity
     # Then it is processed
-    assert process_next_outgoing_activity(db) is True
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity
+    await process_next_outgoing_activity(async_db_session, next_activity)
 
     assert respx_mock.calls.call_count == 1
 
-    outgoing_activity = db.query(models.OutgoingActivity).one()
+    outgoing_activity = (
+        await async_db_session.execute(select(models.OutgoingActivity))
+    ).scalar_one()
     assert outgoing_activity.is_sent is False
     assert outgoing_activity.last_status_code == 500
     assert outgoing_activity.last_response == "oops"
     assert outgoing_activity.is_errored is True
 
     # And it is skipped from processing
-    assert process_next_outgoing_activity(db) is False
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity is None
 
 
-def test_process_next_outgoing_activity__connect_error(
-    db: Session,
+@pytest.mark.asyncio
+async def test_process_next_outgoing_activity__connect_error(
+    async_db_session: AsyncSession,
     respx_mock: respx.MockRouter,
 ) -> None:
     outbox_object = _setup_outbox_object()
@@ -217,11 +241,15 @@ def test_process_next_outgoing_activity__connect_error(
 
     # When processing the next outgoing activity
     # Then it is processed
-    assert process_next_outgoing_activity(db) is True
+    next_activity = await fetch_next_outgoing_activity(async_db_session, set())
+    assert next_activity
+    await process_next_outgoing_activity(async_db_session, next_activity)
 
     assert respx_mock.calls.call_count == 1
 
-    outgoing_activity = db.query(models.OutgoingActivity).one()
+    outgoing_activity = (
+        await async_db_session.execute(select(models.OutgoingActivity))
+    ).scalar_one()
     assert outgoing_activity.is_sent is False
     assert outgoing_activity.error is not None
     assert outgoing_activity.tries == 1