diff --git a/tests/test_store.py b/tests/test_store.py
index ea2d35e..75985d1 100644
--- a/tests/test_store.py
+++ b/tests/test_store.py
@@ -2,26 +2,17 @@ import asyncio
 
 import pytest
 
-from app.models import CurrentStatus, MonitorCreate, MonitorUpdate, State
-from app.store import MonitorNotFoundError, MonitorStore
+from app.models import MonitorCreate
+from app.store import MonitorStore
 
 
-async def test_atomic_update_does_not_lose_status() -> None:
-    store = MonitorStore()
-    monitor = await store.create(MonitorCreate(name="one", url="https://example.com"))
-    status = CurrentStatus(state=State.UP)
-    await asyncio.gather(
-        store.update(monitor.id, MonitorUpdate(name="two")),
-        store.set_status(monitor.id, status),
-    )
-    result = await store.get(monitor.id)
-    assert result.name == "two"
-    assert result.current_status.state == State.UP
-
-
-async def test_delete_is_locked_and_missing_is_typed() -> None:
-    store = MonitorStore()
-    monitor = await store.create(MonitorCreate(name="one", url="https://example.com"))
-    await store.delete(monitor.id)
-    with pytest.raises(MonitorNotFoundError):
-        await store.get(monitor.id)
+@pytest.mark.asyncio
+async def test_concurrent_creates_are_retained_and_results_are_copies() -> None:
+    state = MonitorStore()
+    payload = MonitorCreate(name="same", url="https://example.com")
+    created = await asyncio.gather(*(state.create(payload) for _ in range(25)))
+    assert len(await state.list()) == 25
+    created[0].name = "mutated"
+    persisted = await state.get(created[0].id)
+    assert persisted is not None
+    assert persisted.name == "same"