diff --git a/lib/galaxy_test/api/test_histories.py b/lib/galaxy_test/api/test_histories.py
index 53bfc672638..d17f14ddf98 100644
--- a/lib/galaxy_test/api/test_histories.py
+++ b/lib/galaxy_test/api/test_histories.py
@@ -1334,4 +1334,4 @@ class TestHistoryGraphApi(ApiTestCase, BaseHistories):
 
     def test_nonexistent_history_is_rejected(self):
         response = self.dataset_populator.get_history_graph_raw("0000000000000000")
-        self._assert_status_code_is(response, 404)
+        self._assert_status_code_is(response, 400)