new_contents: #!/usr/bin/env python
  import sys
  
  import pytest
  
  # Mark the test class or function as a slow test, where we avoid running it
  # in a normal test run due to its long running time.
  # Use py.test --includeslowtests to run these kinds of tests.
  slowtest = pytest.mark.skipif(
      "--includeslowtests" not in sys.argv,
      reason="Skipping because this test is a slow test."
  )
  
subject: create a new decorator that marks a test as slow and skips it in a normal run.