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-rw-r--r--tests/hazmat/primitives/utils.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/tests/hazmat/primitives/utils.py b/tests/hazmat/primitives/utils.py
index 4640c2ea..6428b03e 100644
--- a/tests/hazmat/primitives/utils.py
+++ b/tests/hazmat/primitives/utils.py
@@ -311,6 +311,9 @@ def aead_tag_exception_test(backend, cipher_factory, mode_factory):
with pytest.raises(ValueError):
mode_factory(binascii.unhexlify(b"0" * 24), b"000")
+ with pytest.raises(ValueError):
+ mode_factory(binascii.unhexlify(b"0" * 24), b"000000", 2)
+
cipher = Cipher(
cipher_factory(binascii.unhexlify(b"0" * 32)),
mode_factory(binascii.unhexlify(b"0" * 24), b"0" * 16),