30 def test_x25519_unsupported(backend):  argument
54     def test_rfc7748(self, vector, backend):  argument
63     def test_rfc7748_1000_iteration(self, backend):  argument
84     def test_null_shared_key_raises_error(self, backend):  argument
101     def test_deprecated_public_bytes(self, backend):  argument
106     def test_public_bytes_bad_args(self, backend):  argument
140     def test_pub_priv_bytes_raw(self, private_bytes, public_bytes, backend):  argument
155     def test_generate(self, backend):  argument
160     def test_invalid_type_exchange(self, backend):  argument
165     def test_invalid_length_from_public_bytes(self, backend):  argument
172     def test_invalid_length_from_private_bytes(self, backend):  argument
179     def test_invalid_private_bytes(self, backend):  argument
202     def test_invalid_public_bytes(self, backend):  argument
256                                               passwd, load_func, backend):  argument
262     def test_buffer_protocol(self, backend):  argument