diff --git a/tests/test_agents.py b/tests/test_agents.py
index bf0143b..3e81237 100644
--- a/tests/test_agents.py
+++ b/tests/test_agents.py
@@ -97,5 +97,4 @@ class TestAgentRuns:
     @pytest.mark.asyncio
     async def test_unknown_run(self, agent_client):
         res = await agent_client.get(E.run("nonexistent"))
-        H.assert_status(res, 200)
-        assert "error" in res.json()
+        H.assert_status(res, 404)
diff --git a/tests/test_scenario_data.py b/tests/test_scenario_data.py
index de4db39..bdcf597 100644
--- a/tests/test_scenario_data.py
+++ b/tests/test_scenario_data.py
@@ -49,8 +49,7 @@ class TestFlights:
     @pytest.mark.asyncio
     async def test_patch_unknown_flight(self, client):
         res = await client.patch(E.flight("FAKE"), json={"delay_minutes": 10})
-        H.assert_status(res, 200)
-        assert "error" in res.json()
+        H.assert_status(res, 404)
 
 
 class TestCrew:
diff --git a/tests/test_scenarios.py b/tests/test_scenarios.py
index bec9cd0..b78a9ad 100644
--- a/tests/test_scenarios.py
+++ b/tests/test_scenarios.py
@@ -49,5 +49,4 @@ class TestActiveScenario:
     @pytest.mark.asyncio
     async def test_switch_invalid(self, client):
         res = await client.put(E.SCENARIO_ACTIVE, json={"scenario_id": "nonexistent"})
-        H.assert_status(res, 200)
-        assert "error" in res.json()
+        H.assert_status(res, 400)