old_contents: import cProfile
  import pstats
  from django.test.simple import run_tests as django_test_runner
  
  def run_tests(test_labels, verbosity=1, interactive=True,
          extra_tests=[], nodatabase=False):
      """
      Test runner which displays basic profile data.
      Needs some improvement, mostly here for Continuous Integration purposes.
      """
      print "Using profiling test runner"
      cProfile.runctx("django_test_runner(test_labels, verbosity, interactive, extra_tests)", globals(), locals(), filename="django_tests.profile")
      stats = pstats.Stats('django_tests.profile')
      stats.strip_dirs().sort_stats('time').print_stats(30)
      return True
  
new_contents: import cProfile
  import pstats
  from django.test.simple import run_tests as django_test_runner
  
  def run_tests(test_labels, verbosity=1, interactive=True,
          extra_tests=[], nodatabase=False):
      """
      Test runner which displays basic profile data.
      Needs some improvement, mostly here for Continuous Integration purposes.
      """
      print "Using profiling test runner"
      cProfile.runctx("django_test_runner(test_labels, verbosity, interactive, extra_tests)", globals(), locals(), filename="django_tests.profile")
      stats = pstats.Stats('django_tests.profile')
      stats.strip_dirs().sort_stats('time').print_stats(30)
      return 0
  
subject: Return 0, how on earth do you get cprofile's return value?