430 def ca_file(tmpdir):  function
460     ca_file = tmpdir.join("test.pem")
461     ca_file.write_binary(
467     return str(ca_file).encode("ascii")
525     def test_load_client_ca(self, context, ca_file):  argument
529         context.load_client_ca(ca_file)
535         ca_file = tmpdir.join("test.pem")
536         ca_file.write("")
539             context.load_client_ca(str(ca_file).encode("ascii"))
543     def test_load_client_ca_unicode(self, context, ca_file):  argument
547         pytest.deprecated_call(context.load_client_ca, ca_file.decode("ascii"))