old_contents: import sys
  
  def test_python_version():
      assert sys.version_info.major >= (3, 5)
  
  def test_arithmetic():
      assert 2 + 2 == 4
  
new_contents: import sys
  
  def test_python_version():
      assert sys.version_info >= (3, 5)
  
  def test_arithmetic():
      assert 2 + 2 == 4
  
subject: Update test_basic.py