new_contents: import nose.tools as nt
  
  from .test_embed_kernel import setup, teardown, setup_kernel
  
  TIMEOUT = 15
  
  def test_ipython_start_kernel_userns():
      cmd = ('from IPython import start_kernel\n'
             'ns = {"tre": 123}\n'
             'start_kernel(user_ns=ns)')
      
      with setup_kernel(cmd) as client:
          msg_id = client.object_info('tre')
          msg = client.get_shell_msg(block=True, timeout=TIMEOUT)
          content = msg['content']
          assert content['found']
          nt.assert_equal(content['string_form'], u'123')
subject: Add test for IPython.start_kernel()