old_contents: 
  from exp_test_helper import run_exp
  
  import pytest
  
  class TestRun():
      """
      Run and check return code.
      """
  
      @pytest.mark.fast
      def test_run(self):
          run_exp('1deg_jra55_ryf')
  
      @pytest.mark.slow
      def test_slow_run(self):
          run_exp('025deg_jra55_ryf')
  
new_contents: 
  from exp_test_helper import run_exp
  
  import pytest
  
  class TestRun():
      """
      Run and check return code.
      """
  
      @pytest.mark.fast
      def test_1deg_jra55_run(self):
          run_exp('1deg_jra55_ryf')
  
      @pytest.mark.slow
      def test_1deg_core_run(self):
          run_exp('1deg_core_nyf')
  
      @pytest.mark.slow
      def test_slow_run(self):
          run_exp('025deg_jra55_ryf')
  
subject: Include the 1deg core experiment in tests.