old_contents: import muffin
  import pytest
  
  
  @pytest.fixture(scope='session')
  def app(loop):
      return muffin.Application(
          'elasticsearch_app', loop=loop,
          PLUGINS=('muffin_elasticsearch',)
      )
  
  
  def test_plugin_register(app):
      assert 'elasticsearch' in app.ps
      assert app.ps.elasticsearch.conn
  
  
  @pytest.mark.async
  def test_elasticsearch_create_get(app):
      body = {'str': 'foo', 'int': 1}
      result = yield from app.ps.elasticsearch.create(
          index='test',
          doc_type='test',
          id=42,
          body=body
      )
  
      assert result['ok'] is True
  
      result = yield from app.ps.elastisearch.get(
          index='test',
          doc_type='test',
          id=42
      )
      assert result['_source'] == body
  
new_contents: import muffin
  import pytest
  
  
  @pytest.fixture(scope='session')
  def app(loop):
      return muffin.Application(
          'elasticsearch_app', loop=loop,
          PLUGINS=('muffin_elasticsearch',)
      )
  
  
  def test_plugin_register(app):
      assert 'elasticsearch' in app.ps
      assert app.ps.elasticsearch.conn
  
  
  @pytest.mark.async
  def test_elasticsearch_create_get(app):
      body = {'str': 'foo', 'int': 1}
      result = yield from app.ps.elasticsearch.create(
          index='test',
          doc_type='test',
          id=42,
          body=body
      )
  
      assert 'created' in result, result.keys()
      assert result['created'] is True, result['created']
  
      result = yield from app.ps.elasticsearch.get(
          index='test',
          doc_type='test',
          id=42
      )
      assert '_source' in result, result.keys()
      assert result['_source'] == body, result
  
subject: improve asserts in tests