old_contents: import pytest
  from tornado import gen
  
  _used_fixture = False
  
  
  @gen.coroutine
  def dummy(io_loop):
      yield gen.Task(io_loop.add_callback)
      raise gen.Return(True)
  
  
  @pytest.fixture(scope='module')
  def preparations():
      global _used_fixture
      _used_fixture = True
  
  
  pytestmark = pytest.mark.usefixtures('preparations')
  
  
  @pytest.mark.xfail(pytest.__version__ < '2.7.0',
                     reason='py.test 2.7 adds hookwrapper, fixes collection')
  @pytest.mark.gen_test
  def test_uses_pytestmark_fixtures(io_loop):
      assert (yield dummy(io_loop))
      assert _used_fixture
  
new_contents: import pytest
  from tornado import gen
  
  _used_fixture = False
  
  
  @gen.coroutine
  def dummy(io_loop):
      yield gen.Task(io_loop.add_callback)
      raise gen.Return(True)
  
  
  @pytest.fixture(scope='module')
  def preparations():
      global _used_fixture
      _used_fixture = True
  
  
  pytestmark = pytest.mark.usefixtures('preparations')
  
  
  @pytest.mark.xfail(pytest.__version__ < '2.7.0',
                     reason='py.test 2.7 adds hookwrapper, fixes collection')
  @pytest.mark.gen_test
  def test_uses_pytestmark_fixtures(io_loop):
      assert (yield dummy(io_loop))
      assert _used_fixture
  
  class TestClass:
      @pytest.mark.gen_test
      def test_uses_pytestmark_fixtures(self, io_loop):
          assert (yield dummy(io_loop))
          assert _used_fixture
  
subject: Add some test for method signature inspection