exclude :test_str_aref, "needs investigation"
exclude :test_str_aref_len, "needs investigation"
exclude :test_str_assign, "needs investigation"
exclude :test_str_assign_len, "needs investigation"
exclude :test_str_casecmp, "needs investigation"
exclude :test_str_center, "needs investigation"
exclude :test_str_chars, "needs investigation"
exclude :test_str_chop, "needs investigation"
exclude :test_str_chr, "needs investigation"
exclude :test_str_count, "needs investigation"
exclude :test_str_empty?, "needs investigation"
exclude :test_str_end_with?, "needs investigation"
exclude :test_str_include?, "needs investigation"
exclude :test_str_intern, "needs investigation"
exclude :test_str_ljust, "needs investigation"
exclude :test_str_partition, "needs investigation"
exclude :test_str_rindex, "needs investigation"
exclude :test_str_rjust, "needs investigation"
exclude :test_str_rpartition, "needs investigation"
exclude :test_str_scan, "needs investigation"
exclude :test_str_slice!, "needs investigation"
exclude :test_str_split, "needs investigation"
exclude :test_str_squeeze, "needs investigation"
exclude :test_str_start_with?, "needs investigation"
exclude :test_str_sub, "needs investigation"
exclude :test_str_sub!, "needs investigation"
exclude :test_str_succ, "appears to run forever"
exclude :test_tr, "needs investigation"
exclude :test_tr_s, "needs investigation"
