Merge pull request #849 from public/changeup-exceptions-2-electric-boogaloo

Use a single tagged exception instead of a hierarchy

1 files changed, 5 insertions, 3 deletions

diff --git a/tests/hazmat/primitives/twofactor/test_hotp.py b/tests/hazmat/primitives/twofactor/test_hotp.py
index 4bb7c6b3..803f96f3 100644
--- a/tests/hazmat/primitives/twofactor/test_hotp.py
+++ b/tests/hazmat/primitives/twofactor/test_hotp.py
@@ -17,12 +17,14 @@ import os
 
 import pytest
 
-from cryptography.exceptions import InvalidToken, UnsupportedInterface
+from cryptography.exceptions import InvalidToken, _Reasons
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives.hashes import MD5, SHA1
 from cryptography.hazmat.primitives.twofactor.hotp import HOTP
 
-from ....utils import load_nist_vectors, load_vectors_from_file
+from ....utils import (
+    load_nist_vectors, load_vectors_from_file, raises_unsupported_algorithm
+)
 
 vectors = load_vectors_from_file(
     "twofactor/rfc-4226.txt", load_nist_vectors)
@@ -103,5 +105,5 @@ def test_invalid_backend():
 
     pretend_backend = object()
 
-    with pytest.raises(UnsupportedInterface):
+    with raises_unsupported_algorithm(_Reasons.BACKEND_MISSING_INTERFACE):
         HOTP(secret, 8, hashes.SHA1(), pretend_backend)