exclude :test_doc_tag_encoding, "encoding support not implemented"
exclude :test_dump_non_ascii_string_to_file, "missing fix, see tenderlove/psych#272"
exclude :test_emit_alias, "encoding support not implemented"
exclude :test_start_mapping, "encoding support not implemented"
exclude :test_start_sequence, "encoding support not implemented"
exclude :test_io_shiftjis, "encoding support not implemented"