diff --git a/co-gahusb/tests/test_teamlog.py b/co-gahusb/tests/test_teamlog.py
new file mode 100644
index 0000000..0376796
--- /dev/null
+++ b/co-gahusb/tests/test_teamlog.py
@@ -0,0 +1,25 @@
+# co-gahusb/tests/test_teamlog.py
+from app import store
+
+
+async def test_log_event_and_read(r):
+    await store.log_event(r, "message", "Producer→BE: hi")
+    await store.log_event(r, "lock", "BE acquired nas-deploy")
+    res = await store.read_team_log(r)
+    msgs = [e["text"] for e in res["events"]]
+    assert msgs == ["Producer→BE: hi", "BE acquired nas-deploy"]
+
+
+async def test_team_log_after_id(r):
+    e1 = (await store.log_event(r, "message", "a"))["event_id"]
+    await store.log_event(r, "message", "b")
+    res = await store.read_team_log(r, after_id=e1)
+    assert [e["text"] for e in res["events"]] == ["b"]
+
+
+async def test_team_log_capped(r):
+    for i in range(10):
+        await store.log_event(r, "message", f"m{i}")
+    res = await store.read_team_log(r, limit=3)
+    assert len(res["events"]) == 3
+    assert res["events"][-1]["text"] == "m9"