diff --git a/tests/internal_bench/var-6.6-instance-builtin_ordered.py b/tests/internal_bench/var-6.6-instance-builtin_ordered.py
new file mode 100644
index 0000000000..02d7525230
--- /dev/null
+++ b/tests/internal_bench/var-6.6-instance-builtin_ordered.py
@@ -0,0 +1,12 @@
+import bench
+
+
+def test(num):
+    i = 0
+    o = set()  # object with largest rom-frozen ordered locals_dict
+    n = "__contains__"  # last element in that dict for longest lookup
+    while i < num:
+        i += hasattr(o, n)  # True, converts to 1
+
+
+bench.run(test)