diff --git a/tests/web/test_api.py b/tests/web/test_api.py
index 762a33c..9ac1e6b 100644
--- a/tests/web/test_api.py
+++ b/tests/web/test_api.py
@@ -58,6 +58,8 @@ def test_grade_is_aliased_across_api_versions(client):
 def test_query_validation_rejects_out_of_range(client):
     assert client.get("/thermograph/api/v2/grade",
                       params={"lat": 999, "lon": 0}).status_code == 422
+    assert client.get("/thermograph/api/v2/grade",
+                      params={**Q, "days": 0}).status_code == 422
 
 
 def test_api_version_reports_backend_contract(client):
@@ -66,8 +68,6 @@ def test_api_version_reports_backend_contract(client):
     body = r.json()
     assert {"backend_version", "min_frontend", "payload_ver"} <= body.keys()
     assert body["backend_version"] == "2"
-    assert client.get("/thermograph/api/v2/grade",
-                      params={**Q, "days": 0}).status_code == 422
 
 
 def test_day_detail_and_ladders(client, history):