Un-double the test doubles

1 files changed, 2 insertions, 9 deletions

diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 8f7fdb18..a109c219 100644
--- a/tests/hazmat/primitives/test_hashes.py
+++ b/tests/hazmat/primitives/test_hashes.py
@@ -8,23 +8,16 @@ import pretend
 
 import pytest
 
-from cryptography import utils
 from cryptography.exceptions import AlreadyFinalized, _Reasons
 from cryptography.hazmat.backends.interfaces import HashBackend
 from cryptography.hazmat.primitives import hashes
 
 from .utils import generate_base_hash_test
 from ..backends.test_multibackend import DummyHashBackend
+from ...doubles import DummyHashAlgorithm
 from ...utils import raises_unsupported_algorithm
 
 
-@utils.register_interface(hashes.HashAlgorithm)
-class UnsupportedDummyHash(object):
-    name = "unsupported-dummy-hash"
-    block_size = None
-    digest_size = None
-
-
 @pytest.mark.requires_backend_interface(interface=HashBackend)
 class TestHashContext(object):
     def test_hash_reject_unicode(self, backend):
@@ -59,7 +52,7 @@ class TestHashContext(object):
 
     def test_unsupported_hash(self, backend):
         with raises_unsupported_algorithm(_Reasons.UNSUPPORTED_HASH):
-            hashes.Hash(UnsupportedDummyHash(), backend)
+            hashes.Hash(DummyHashAlgorithm(), backend)
 
 
 @pytest.mark.supported(