old_contents: import unittest
  from jobTests import JobTests
  from validatorTests import ValidatorTests
  from fileTypeTests import FileTypeTests
  
  def runTests():
      """Create and run validation test suite."""
      suite = unittest.TestSuite()
      suite.addTests(unittest.makeSuite(ValidatorTests))
      suite.addTests(unittest.makeSuite(JobTests))
      suite.addTests(unittest.makeSuite(FileTypeTests))
  
      print("{} tests in suite".format(suite.countTestCases()))
      runner = unittest.TextTestRunner(verbosity=2)
      runner.run(suite)
  
  if __name__ == '__main__':
      runTests()
  
new_contents: import unittest
  from jobTests import JobTests
  from validatorTests import ValidatorTests
  from fileTypeTests import FileTypeTests
  
  def runTests():
      """Create and run validation test suite."""
      suite = unittest.TestSuite()
      suite.addTests(unittest.makeSuite(ValidatorTests))
      suite.addTests(unittest.makeSuite(JobTests))
      suite.addTests(unittest.makeSuite(FileTypeTests))
      # to run a single test:
      # suite.addTest(FileTypeTests('test_program_mixed'))
  
      print("{} tests in suite".format(suite.countTestCases()))
      runner = unittest.TextTestRunner(verbosity=2)
      runner.run(suite)
  
  if __name__ == '__main__':
      runTests()
  
subject: add comment showing how to run a single test