text: import os
  import argparse
  
  from rst_courses_converter import __version__
  
  
  def get_parser():
      """
      Creates a new argument parser.
      """
      parser = argparse.ArgumentParser('RST Courses Converter')
      version = '%(prog)s ' + __version__
      parser.add_argument('--version', '-v', action='version', version=version)
      return parser
  
  
  def main(args=None):
      """
      Called with ``python -m rst_courses_converter.tests``: run main test suite.
      """
  
      parser = get_parser()
      args = parser.parse_args(args)
  
      # Check if pytest is available
      try:
          import pytest
      except ImportError:
          raise SystemExit(
              'You need py.test to run the test suite.\n'
              'You can install it using your distribution package manager or\n'
              '    $ python -m pip install pytest --user'
          )
  
      # Get data from test_module
      import rst_courses_converter.tests as test_module
      test_path = os.path.abspath(os.path.dirname(test_module.__file__))
      pytest.main([test_path, '-m', 'not documentation'])
  
  
  if __name__ == '__main__':
      main()