old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  from pycompat import python as py
  from pycompat import system
  
  import sys
  import unittest
  
  class TestPyCompat(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_python_is_64bits(self):
          self.assertEqual(python.is_64bits, not python.is_32bits)
  
      # Is failing on Travis-CI Python 3+
      #'def test_immutability(self):
      #'    try:
      #'        py.is2xx = 1
      #'        self.assertTrue(False)
      #'    except AttributeError:
      #'        self.assertTrue(True)
      #'    else:
      #        self.assertTrue(False)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  from pycompat import python as py
  from pycompat import system
  
  import sys
  import unittest
  
  class TestPyCompat(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_python_is_64bits(self):
          self.assertEqual(py.is_64bits, not py.is_32bits)
  
      # Is failing on Travis-CI Python 3+
      #'def test_immutability(self):
      #'    try:
      #'        py.is2xx = 1
      #'        self.assertTrue(False)
      #'    except AttributeError:
      #'        self.assertTrue(True)
      #'    else:
      #        self.assertTrue(False)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Fix test.