old_contents: import time
  
  import pytest
  import salt.master
  from tests.support.mock import patch
  
  
  def test_fileserver_duration():
      with patch("salt.master.FileserverUpdate._do_update") as update:
          start = time.time()
          salt.master.FileserverUpdate.update(1, {}, 1)
          end = time.time()
          # Interval is equal to timeout so the _do_update method will be called
          # one time.
          update.called_once()
          # Timeout is 1 second
          assert 2 > end - start > 1
  
new_contents: import time
  
  import salt.master
  from tests.support.mock import patch
  
  
  def test_fileserver_duration():
      with patch("salt.master.FileserverUpdate._do_update") as update:
          start = time.time()
          salt.master.FileserverUpdate.update(1, {}, 1)
          end = time.time()
          # Interval is equal to timeout so the _do_update method will be called
          # one time.
          update.called_once()
          # Timeout is 1 second
          assert 2 > end - start > 1
  
subject: Remove un-used import