diff --git a/c/tests/test_minimal_cpp.cpp b/c/tests/test_minimal_cpp.cpp
index 0709ad9afd..2ff0e01c8d 100644
--- a/c/tests/test_minimal_cpp.cpp
+++ b/c/tests/test_minimal_cpp.cpp
@@ -218,7 +218,7 @@ safe_sort_edges(tsk_table_sorter_t *sorter, tsk_size_t start)
         try {
             ret = sort_edges_raises_non_exception(sorter, start);
         } catch (...) {
-            ret = -123456;
+            ret = -12346;
         }
     }
     return ret;
@@ -246,7 +246,7 @@ test_edge_sorting_errors()
      * of exception that get thrown. */
     sorter.user_data = &tables;
     ret = tsk_table_sorter_run(&sorter, NULL);
-    assert(ret == -123456);
+    assert(ret == -12346);
 
     tsk_table_sorter_free(&sorter);
     tsk_table_collection_free(&tables);