make this test happy

1 files changed, 4 insertions, 8 deletions

diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 79fc25c3..bab5bfca 100644
--- a/tests/hazmat/primitives/test_hashes.py
+++ b/tests/hazmat/primitives/test_hashes.py
@@ -23,6 +23,7 @@ from cryptography import utils
 from cryptography.exceptions import (
     AlreadyFinalized, _Reasons
 )
+from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.backends.interfaces import HashBackend
 from cryptography.hazmat.primitives import hashes, interfaces
 
@@ -45,16 +46,11 @@ class TestHashContext(object):
             m.update(six.u("\u00FC"))
 
     def test_copy_backend_object(self):
-        @utils.register_interface(HashBackend)
-        class PretendBackend(object):
-            pass
-
-        pretend_backend = PretendBackend()
+        backend = default_backend()
         copied_ctx = pretend.stub()
         pretend_ctx = pretend.stub(copy=lambda: copied_ctx)
-        h = hashes.Hash(hashes.SHA1(), backend=pretend_backend,
-                        ctx=pretend_ctx)
-        assert h._backend is pretend_backend
+        h = hashes.Hash(hashes.SHA1(), backend=backend, ctx=pretend_ctx)
+        assert h._backend is backend
         assert h.copy()._backend is h._backend
 
     def test_hash_algorithm_instance(self, backend):