diff --git a/misc/load-test.py b/misc/load-test.py
index d02f3345db2ff3b57b96dad2a5fc93005d55c06f..a62a8a3159c131b90bc264e515e35f81f09672eb 100755
--- a/misc/load-test.py
+++ b/misc/load-test.py
@@ -65,7 +65,7 @@ def redeem(client, index):
         duration = int((after - before) * 1000)
         print("Request complete in {}ms".format(duration))
         body = yield readBody(response)
-        assert response.code == 200, (response.code, body)
+        assert response.code == 200, (voucher, response.code, body)
         times.append(duration)
     returnValue(times)