1 files changed, 10 insertions, 1 deletions
diff --git a/tests/hazmat/primitives/test_ec.py b/tests/hazmat/primitives/test_ec.py
index 1b3bb9b3..9ed762cb 100644
--- a/tests/hazmat/primitives/test_ec.py
+++ b/tests/hazmat/primitives/test_ec.py
@@ -68,11 +68,20 @@ class DummyCurve(object):
 
 @utils.register_interface(interfaces.EllipticCurveSignatureAlgorithm)
 class DummySignatureAlgorithm(object):
-    pass
+    algorithm = None
 
 
 @utils.register_interface(EllipticCurveBackend)
 class DeprecatedDummyECBackend(object):
+    def _unimplemented(self):
+        raise NotImplementedError
+
+    elliptic_curve_signature_algorithm_supported = _unimplemented
+    load_elliptic_curve_private_numbers = _unimplemented
+    load_elliptic_curve_public_numbers = _unimplemented
+    elliptic_curve_supported = _unimplemented
+    generate_elliptic_curve_private_key = _unimplemented
+
     def elliptic_curve_private_key_from_numbers(self, numbers):
         return b"private_key"