From 82b0fe5251ed3ce2349447b6391bb068a214b886 Mon Sep 17 00:00:00 2001
From: Lee Dogeon <dev.moreal@gmail.com>
Date: Sat, 14 Feb 2026 19:11:52 +0900
Subject: [PATCH] Make HASH/HASHXOF types immutable

---
 Lib/test/test_hashlib.py     | 2 --
 crates/stdlib/src/hashlib.rs | 4 ++--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index cd9cbe9bff7..9bb9c3bc925 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -994,8 +994,6 @@ def test_hash_disallow_instantiation(self):
         support.check_disallow_instantiation(self, HASH)
         support.check_disallow_instantiation(self, HASHXOF)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_readonly_types(self):
         for algorithm, constructors in self.constructors_to_test.items():
             # all other types have DISALLOW_INSTANTIATION
diff --git a/crates/stdlib/src/hashlib.rs b/crates/stdlib/src/hashlib.rs
index c9902eff60a..dee02270b91 100644
--- a/crates/stdlib/src/hashlib.rs
+++ b/crates/stdlib/src/hashlib.rs
@@ -103,7 +103,7 @@ pub mod _hashlib {
         }
     }
 
-    #[pyclass(with(Representable))]
+    #[pyclass(with(Representable), flags(IMMUTABLETYPE))]
     impl PyHasher {
         fn new(name: &str, d: HashWrapper) -> Self {
             Self {
@@ -176,7 +176,7 @@ pub mod _hashlib {
         }
     }
 
-    #[pyclass]
+    #[pyclass(flags(IMMUTABLETYPE))]
     impl PyHasherXof {
         fn new(name: &str, d: HashXofWrapper) -> Self {
             Self {