old_contents: import pytest
  import salt.loader
  import salt.pillar
  from salt.utils.odict import OrderedDict
  
  
  @pytest.mark.parametrize(
      "envs",
      (
          ["a", "b", "c"],
          ["c", "b", "a"],
          ["b", "a", "c"],
      ),
  )
  def test_pillar_envs_order(envs, temp_salt_minion, tmp_path):
      opts = temp_salt_minion.config.copy()
      # Stop using OrderedDict once we drop Py3.5 support
      opts["pillar_roots"] = OrderedDict()
      for envname in envs:
          opts["pillar_roots"][envname] = [str(tmp_path / envname)]
      grains = salt.loader.grains(opts)
      pillar = salt.pillar.Pillar(
          opts,
          grains,
          temp_salt_minion.id,
          "base",
      )
      # The base environment is always present and as the first environment name
      assert pillar._get_envs() == ["base"] + envs
  
new_contents: import pytest
  import salt.loader
  import salt.pillar
  from salt.utils.odict import OrderedDict
  
  
  @pytest.mark.parametrize(
      "envs",
      (
          ["a", "b", "c"],
          ["c", "b", "a"],
          ["b", "a", "c"],
      ),
  )
  def test_pillar_envs_order(envs, temp_salt_minion, tmp_path):
      opts = temp_salt_minion.config.copy()
      # Stop using OrderedDict once we drop Py3.5 support
      opts["pillar_roots"] = OrderedDict()
      for envname in envs:
          opts["pillar_roots"][envname] = [str(tmp_path / envname)]
      grains = salt.loader.grains(opts)
      pillar = salt.pillar.Pillar(
          opts,
          grains,
          temp_salt_minion.id,
          "base",
      )
      # The base environment is always present and as the first environment name
      assert pillar._get_envs() == ["base"] + envs
  
  
  def test_pillar_get_tops_should_not_error_when_merging_strategy_is_none_and_no_pillarenv(
      temp_salt_minion,
  ):
      opts = temp_salt_minion.config.copy()
      opts["pillarenv"] = None
      opts["pillar_source_merging_strategy"] = "none"
      pillar = salt.pillar.Pillar(
          opts=opts,
          grains=salt.loader.grains(opts),
          minion_id=temp_salt_minion.id,
          saltenv="base",
      )
      tops, errors = pillar.get_tops()
      assert not errors
  
subject: Add testcase written by @waynew