new_contents: import unittest
  from test_evaluation_metrics import EvaluationMetricsTestCase
  from test_appliance_trace import ApplianceTraceTestCase
  from test_appliance_instance import ApplianceInstanceTestCase
  from test_appliance_set import ApplianceSetTestCase
  from test_appliance_type import ApplianceTypeTestCase
  from test_utils import UtilsTestCase
  # import test_pecanstreet_dataset_adapter as test_psda
  
  def all_tests():
      ev_m_suite =\
          unittest.TestLoader().loadTestsFromTestCase(EvaluationMetricsTestCase)
      a_tr_suite =\
          unittest.TestLoader().loadTestsFromTestCase(ApplianceTraceTestCase)
      a_in_suite =\
          unittest.TestLoader().loadTestsFromTestCase(ApplianceIstanceTestCase)
      a_st_suite =\
          unittest.TestLoader().loadTestsFromTestCase(ApplianceSetTestCase)
      a_ty_suite =\
          unittest.TestLoader().loadTestsFromTestCase(ApplianceTypeTestCase)
      util_suite =\
          unittest.TestLoader().loadTestsFromTestCase(UtilsTestCase)
  
      psda_tests = [
          'test_get_table_names',
          'test_get_month_traces',
      ]
      psda_suite =\
          unittest.TestSuite(map(test_psda.PecanStreetDatasetAdapterTestCase, psda_tests))
  
      all_tests = unittest.TestSuite([
          ev_m_suite,
          a_tr_suite,
          a_in_suite,
          a_st_suite,
          a_ty_suite,
          util_suite,
          psda_suite,
      ])
  
      return all_tests
  
  if __name__ == "__main__":
      print 'running fast tests'
      #suite = all_tests()
      #unittest.TextTestRunner().run(suite)
  
subject: add inflexible fast tests