diff --git a/tests/test_api.py b/tests/test_api.py
index ff3a531..4104f7e 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -1,46 +1,32 @@
-from unittest.mock import AsyncMock, patch
+import httpx
+import pytest
 
-from app.models import CheckSnapshot, State, now
+pytestmark = pytest.mark.anyio
 
 
-def create(client, url="https://example.com/path?secret=value"):
-    response = client.post("/monitors", json={"name": "site", "url": url})
-    assert response.status_code == 201
-    return response.json()
+async def test_crud_status_and_operations(client: httpx.AsyncClient) -> None:
+    created = await client.post("/monitors", json={"name": "site", "url": "https://example.com/a"})
+    assert created.status_code == 201
+    monitor = created.json()
+    monitor_id = monitor["id"]
+    assert monitor["status"]["state"] == "unknown"
+    assert (await client.get("/monitors")).json()[0]["id"] == monitor_id
+    assert (await client.get(f"/monitors/{monitor_id}")).status_code == 200
+
+    updated = await client.put(
+        f"/monitors/{monitor_id}",
+        json={"name": "new", "url": "https://example.org/"},
+    )
+    assert updated.status_code == 200
+    assert updated.json()["status"]["state"] == "unknown"
+    assert (await client.get(f"/monitors/{monitor_id}/status")).status_code == 200
+    assert (await client.delete(f"/monitors/{monitor_id}")).status_code == 204
+    assert (await client.get(f"/monitors/{monitor_id}")).status_code == 404
+
+    assert (await client.get("/health/live")).json() == {"status": "ok"}
+    assert (await client.get("/health/ready")).json() == {"status": "ready"}
 
 
-def test_operational_routes_document_ephemeral_storage(client):
-    assert client.get("/healthz").json() == {"status": "ok"}
-    assert client.get("/readyz").json() == {
-        "status": "ready", "storage": "process-local-memory"
-    }
-
-
-def test_crud_and_status_lifecycle(client):
-    item = create(client)
-    ident = item["id"]
-    assert item["status"]["state"] == "unknown"
-    assert client.get("/monitors").json()[0]["id"] == ident
-    assert client.get(f"/monitors/{ident}/status").json()["state"] == "unknown"
-    replaced = client.put(f"/monitors/{ident}", json={
-        "name": "new", "url": "https://example.org"
-    })
-    assert replaced.status_code == 200
-    assert replaced.json()["revision"] == 2
-    assert client.delete(f"/monitors/{ident}").status_code == 204
-    assert client.get(f"/monitors/{ident}").status_code == 404
-
-
-def test_check_updates_status(client):
-    item = create(client)
-    result = CheckSnapshot(state=State.up, checked_at=now(), latency_ms=2, http_status=204)
-    with patch("app.main.check_url", new=AsyncMock(return_value=result)):
-        response = client.post(f"/monitors/{item['id']}/check")
-    assert response.status_code == 200
-    assert response.json()["state"] == "up"
-    assert client.get(f"/monitors/{item['id']}/status").json()["http_status"] == 204
-
-
-def test_validation_and_not_found(client):
-    assert client.post("/monitors", json={"name": "", "url": "file:///tmp/x"}).status_code == 422
-    assert client.get("/monitors/00000000-0000-0000-0000-000000000000").status_code == 404
+async def test_validation_and_missing(client: httpx.AsyncClient) -> None:
+    assert (await client.post("/monitors", json={"name": "", "url": "file:///x"})).status_code == 422
+    assert (await client.get("/monitors/00000000-0000-0000-0000-000000000000")).status_code == 404