diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index c7c128e75568e2..a515d3a3469330 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -901,36 +901,18 @@ def test_get_fips_mode(self):
if fips_mode is not None:
self.assertIsInstance(fips_mode, int)
- def test_disallow_instanciation(self):
- constructors = []
- try:
- import _md5
- constructors.append(_md5.md5)
- except ImportError:
- pass
- try:
- import _sha1
- constructors.append(_sha1.sha1)
- except ImportError:
- pass
- try:
- import _sha256
- constructors.append(_sha256.sha224)
- constructors.append(_sha256.sha256)
- except ImportError:
- pass
- try:
- import _sha512
- constructors.append(_sha512.sha384)
- constructors.append(_sha512.sha512)
- except ImportError:
- pass
-
- for constructor in constructors:
- h = constructor()
- with self.subTest(constructor=constructor):
- hash_type = type(h)
- self.assertRaises(TypeError, hash_type)
+ @support.cpython_only
+ def test_disallow_instantiation(self):
+ for algorithm, constructors in self.constructors_to_test.items():
+ if algorithm.startswith(("sha3_", "shake", "blake")):
+ # _sha3 and _blake types can be instantiated
+ continue
+ # all other types have DISALLOW_INSTANTIATION
+ for constructor in constructors:
+ h = constructor()
+ with self.subTest(constructor=constructor):
+ hash_type = type(h)
+ self.assertRaises(TypeError, hash_type)
@unittest.skipUnless(HASH is not None, 'need _hashlib')
def test_hash_disallow_instanciation(self):
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