old_contents: import pytest
  
  
  class TestLocking(object):
  
      def test_correct_os_type(self, ctx, config):
          os_type = ctx.config.get("os_type")
          if os_type is None:
              pytest.skip('os_type was not defined')
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.os.name == os_type
  
      def test_correct_os_version(self, ctx, config):
          os_version = ctx.config.get("os_version")
          if os_version is None:
              pytest.skip('os_version was not defined')
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.os.version == os_version
  
      def test_correct_machine_type(self, ctx, config):
          machine_type = ctx.machine_type
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.machine_type in machine_type
  
new_contents: import pytest
  
  
  class TestLocking(object):
  
      def test_correct_os_type(self, ctx, config):
          os_type = ctx.config.get("os_type")
          if os_type is None:
              pytest.skip('os_type was not defined')
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.os.name == os_type
  
      def test_correct_os_version(self, ctx, config):
          os_version = ctx.config.get("os_version")
          if os_version is None:
              pytest.skip('os_version was not defined')
          if ctx.config.get("os_type") == "debian":
              pytest.skip('known issue with debian versions; see: issue #10878')
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.os.version == os_version
  
      def test_correct_machine_type(self, ctx, config):
          machine_type = ctx.machine_type
          for remote in ctx.cluster.remotes.iterkeys():
              assert remote.machine_type in machine_type
  
subject: Make an exception for debian in tests.test_correct_os_version