Explicit backend

1 files changed, 6 insertions, 15 deletions

diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 367e764f..321082f6 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
@@ -28,7 +27,7 @@ from .utils import generate_base_hash_test
 
 class TestHashContext(object):
     def test_hash_reject_unicode(self, backend):
-        m = hashes.Hash(hashes.SHA1(), backend=backend)
+        m = hashes.Hash(hashes.SHA1(), backend)
         with pytest.raises(TypeError):
             m.update(six.u("\u00FC"))
 
@@ -36,24 +35,16 @@ class TestHashContext(object):
         pretend_backend = pretend.stub()
         copied_ctx = pretend.stub()
         pretend_ctx = pretend.stub(copy=lambda: copied_ctx)
-        h = hashes.Hash(hashes.SHA1(), backend=pretend_backend,
-                        ctx=pretend_ctx)
+        h = hashes.Hash(hashes.SHA1(), pretend_backend, ctx=pretend_ctx)
         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)
 
-    def test_raises_after_finalize(self):
-        h = hashes.Hash(hashes.SHA1())
+    def test_raises_after_finalize(self, backend):
+        h = hashes.Hash(hashes.SHA1(), backend)
         h.finalize()
 
         with pytest.raises(AlreadyFinalized):