43 def test_chacha20poly1305_unsupported_on_older_openssl(backend):  argument
69     def test_bad_key(self, backend):  argument
85                                       backend):  argument
94     def test_nonce_not_12_bytes(self, backend):  argument
103     def test_decrypt_data_too_short(self, backend):  argument
109     def test_associated_data_none_equal_to_empty_bytestring(self, backend):  argument
127     def test_openssl_vectors(self, vector, backend):  argument
151     def test_boringssl_vectors(self, vector, backend):  argument
170     def test_buffer_protocol(self, backend):  argument
191 def test_aesccm_unsupported_on_older_openssl(backend):  argument
213     def test_default_tag_length(self, backend):  argument
221     def test_invalid_tag_length(self, backend):  argument
232     def test_invalid_nonce_length(self, backend):  argument
256     def test_vectors(self, vector, backend):  argument
271     def test_roundtrip(self, backend):  argument
281     def test_nonce_too_long(self, backend):  argument
298     def test_params_not_bytes(self, nonce, data, associated_data, backend):  argument
304     def test_bad_key(self, backend):  argument
311     def test_bad_generate_key(self, backend):  argument
318     def test_associated_data_none_equal_to_empty_bytestring(self, backend):  argument
329     def test_decrypt_data_too_short(self, backend):  argument
335     def test_buffer_protocol(self, backend):  argument
407     def test_params_not_bytes(self, nonce, data, associated_data, backend):  argument
416     def test_invalid_nonce_length(self, backend):  argument
422     def test_bad_key(self, backend):  argument
429     def test_bad_generate_key(self, backend):  argument
436     def test_associated_data_none_equal_to_empty_bytestring(self, backend):  argument
447     def test_buffer_protocol(self, backend):  argument