old_contents: import subprocess
  import sys
  
  from numba.tests.support import TestCase
  import unittest
  
  
  class TestNumbaImport(TestCase):
      """
      Test behaviour of importing Numba.
      """
  
      def test_laziness(self):
          """
          Importing top-level numba features should not import too many modules.
          """
          # A heuristic set of modules that shouldn't be imported immediately
          blacklist = [
              'cffi',
              'distutils',
              'numba.cuda',
              'numba.hsa',
              'numba.targets.mathimpl',
              'numba.targets.randomimpl',
              'numba.tests',
              'numba.typing.collections',
              'numba.typing.listdecl',
              'numba.typing.npdatetime',
              ]
          # Sanity check the modules still exist...
          for mod in blacklist:
              if mod not in ('cffi', 'numba.hsa'):
                  __import__(mod)
  
          code = """if 1:
              from numba import jit, vectorize
              from numba.core import types
              import sys
              print(list(sys.modules))
              """
  
          popen = subprocess.Popen([sys.executable, "-c", code],
                                   stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          out, err = popen.communicate()
          if popen.returncode != 0:
              raise AssertionError("process failed with code %s: stderr follows\n%s\n"
                                   % (popen.returncode, err.decode()))
  
          modlist = set(eval(out.strip()))
          unexpected = set(blacklist) & set(modlist)
          self.assertFalse(unexpected, "some modules unexpectedly imported")
  
new_contents: import subprocess
  import sys
  
  from numba.tests.support import TestCase
  import unittest
  
  
  class TestNumbaImport(TestCase):
      """
      Test behaviour of importing Numba.
      """
  
      def test_laziness(self):
          """
          Importing top-level numba features should not import too many modules.
          """
          # A heuristic set of modules that shouldn't be imported immediately
          blacklist = [
              'cffi',
              'distutils',
              'numba.cuda',
              'numba.cpython.mathimpl',
              'numba.cpython.randomimpl',
              'numba.tests',
              'numba.core.typing.collections',
              'numba.core.typing.listdecl',
              'numba.core.typing.npdatetime',
              ]
          # Sanity check the modules still exist...
          for mod in blacklist:
              if mod not in ('cffi',):
                  __import__(mod)
  
          code = """if 1:
              from numba import jit, vectorize
              from numba.core import types
              import sys
              print(list(sys.modules))
              """
  
          popen = subprocess.Popen([sys.executable, "-c", code],
                                   stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          out, err = popen.communicate()
          if popen.returncode != 0:
              raise AssertionError("process failed with code %s: stderr follows\n%s\n"
                                   % (popen.returncode, err.decode()))
  
          modlist = set(eval(out.strip()))
          unexpected = set(blacklist) & set(modlist)
          self.assertFalse(unexpected, "some modules unexpectedly imported")
  
subject: Fix up test_import