*DumbDBMTestCase.test_check_closed
*DumbDBMTestCase.test_close_twice
*DumbDBMTestCase.test_create_new
*DumbDBMTestCase.test_dumbdbm_creation
*DumbDBMTestCase.test_invalid_flag
*DumbDBMTestCase.test_missing_index
*DumbDBMTestCase.test_warn_on_ignored_flags
*DumbDBMTestCase.test_write_contains
