24     def test_invalid_key(self, backend):  argument
27                         None, backend=backend)
33                         None, backend=backend)
38     def test_already_finalized(self, backend):  argument
41                         None, backend=backend)
50                         None, backend=backend)
59                         None, backend=backend)
65     def test_key_length(self, backend):  argument
68                         None, backend=backend)
73     def test_rlen(self, backend):  argument
77                       None, backend=backend)
79     def test_r_type(self, backend):  argument
83                       None, backend=backend)
85     def test_l_type(self, backend):  argument
89                       None, backend=backend)
91     def test_l(self, backend):  argument
95                       None, backend=backend)
97     def test_unsupported_mode(self, backend):  argument
101                       None, backend=backend)
103     def test_unsupported_location(self, backend):  argument
107                       backend=backend)
109     def test_unsupported_parameters(self, backend):  argument
113                       b'fixed', backend=backend)
115     def test_unsupported_hash(self, backend):  argument
119                       None, backend=backend)
121     def test_unsupported_algorithm(self, backend):  argument
125                       None, backend=backend)
127     def test_invalid_backend(self, backend):  argument
131                       None, backend=object())
133     def test_unicode_error_label(self, backend):  argument
137                       backend=backend)
139     def test_unicode_error_context(self, backend):  argument
143                       None, backend=backend)
145     def test_unicode_error_key_material(self, backend):  argument
149                             b'context', None, backend=backend)
152     def test_buffer_protocol(self, backend):  argument
155                         None, backend=backend)