diff --git a/tests/test_api_sources.py b/tests/test_api_sources.py
index c48ed65..28d1a11 100644
--- a/tests/test_api_sources.py
+++ b/tests/test_api_sources.py
@@ -39,7 +39,10 @@ async def test_schedule_status_shape(client):
     resp = await client.get("/api/sources/schedule-status")
     assert resp.status_code == 200
     body = await resp.get_json()
-    assert set(body) == {"last_tick_at", "next_due_at", "due_now", "auto_sources"}
+    assert set(body) == {
+        "last_tick_at", "next_due_at", "due_now", "auto_sources",
+        "platform_cooldowns",
+    }
     assert isinstance(body["due_now"], int)
     assert isinstance(body["auto_sources"], int)
 
diff --git a/tests/test_api_system_activity.py b/tests/test_api_system_activity.py
index f5832ef..8191a8e 100644
--- a/tests/test_api_system_activity.py
+++ b/tests/test_api_system_activity.py
@@ -60,7 +60,10 @@ async def test_summary_returns_rollup_shape(client, monkeypatch):
     assert body["queued_total"] == 3  # only ml has a non-zero depth
     assert isinstance(body["running"], int)
     assert isinstance(body["failing"], int)
-    assert set(body["scheduler"]) == {"last_tick_at", "next_due_at", "due_now", "auto_sources"}
+    assert set(body["scheduler"]) == {
+        "last_tick_at", "next_due_at", "due_now", "auto_sources",
+        "platform_cooldowns",
+    }
 
 
 @pytest.mark.asyncio