diff --git a/tests/basics/builtin_hash.py b/tests/basics/builtin_hash.py
new file mode 100644
index 0000000000..c4c7019b47
--- /dev/null
+++ b/tests/basics/builtin_hash.py
@@ -0,0 +1,10 @@
+# test builtin hash function
+
+class A:
+    def __hash__(self):
+        return 123
+    def __repr__(self):
+        return "a instance"
+
+print(hash(A()))
+print({A():1})