Merge pull request #227 from dreid/explicit-backend-in-hazmat

Explicit backend

1 files changed, 4 insertions, 12 deletions

diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 367e764f..ff42e8f4 100644
--- a/tests/hazmat/primitives/test_hashes.py
+++ b/tests/hazmat/primitives/test_hashes.py
@@ -20,7 +20,6 @@ import pytest
 import six
 
 from cryptography.exceptions import AlreadyFinalized
-from cryptography.hazmat.bindings import _default_backend
 from cryptography.hazmat.primitives import hashes
 
 from .utils import generate_base_hash_test
@@ -41,19 +40,12 @@ class TestHashContext(object):
         assert h._backend is pretend_backend
         assert h.copy()._backend is h._backend
 
-    def test_default_backend_creation(self):
-        """
-        This test assumes the presence of SHA1 in the default backend.
-        """
-        h = hashes.Hash(hashes.SHA1())
-        assert h._backend is _default_backend
-
-    def test_hash_algorithm_instance(self):
+    def test_hash_algorithm_instance(self, backend):
         with pytest.raises(TypeError):
-            hashes.Hash(hashes.SHA1)
+            hashes.Hash(hashes.SHA1, backend=backend)
 
-    def test_raises_after_finalize(self):
-        h = hashes.Hash(hashes.SHA1())
+    def test_raises_after_finalize(self, backend):
+        h = hashes.Hash(hashes.SHA1(), backend=backend)
         h.finalize()
 
         with pytest.raises(AlreadyFinalized):