old_contents: import models.concept_case
  import models.doctest_case
  
  cases = { 
            'concept' : models.concept_case.ConceptTestCase,
            'python' : models.doctest_case.PythonTestCase
          }
  
  protocols = [ 'grading', 'unlock' ]
  
new_contents: import models.concept_case
  import models.doctest_case
  
  cases = { 
            'concept' : models.concept_case.ConceptCase,
            'python' : models.doctest_case.DoctestCase
          }
  
  protocols = [ 'grading', 'unlock' ]
  
subject: Change config.py to the correct test name to fix publishing