old_contents: """Basic CLI functionality checks.
  """
  from textwrap import dedent
  
  import pytest
  
  
  @pytest.mark.parametrize("entrypoint", [
      ("fake_pip = pip._internal.main:main",),
      ("fake_pip = pip._internal:main",),
      ("fake_pip = pip:main",),
  ])
  def test_entrypoints_work(entrypoint, script):
      fake_pkg = script.temp_path / "fake_pkg"
      fake_pkg.mkdir()
      fake_pkg.joinpath("setup.py").write_text(dedent("""
      from setuptools import setup
  
      setup(
          name="fake-pip",
          version="0.1.0",
          entry_points={{
              "console_scripts": [
                  {!r}
              ]
          }}
      )
      """.format(entrypoint)))
  
      # expect_temp=True, because pip install calls setup.py which
      # in turn creates fake_pkg.egg-info.
      script.pip("install", "-vvv", str(fake_pkg), expect_temp=True)
      result = script.pip("-V")
      result2 = script.run("fake_pip", "-V", allow_stderr_warning=True)
      assert result.stdout == result2.stdout
      assert "old script wrapper" in result2.stderr
  
new_contents: """Basic CLI functionality checks.
  """
  from textwrap import dedent
  
  import pytest
  
  
  @pytest.mark.parametrize("entrypoint", [
      ("fake_pip = pip._internal.main:main",),
      ("fake_pip = pip._internal:main",),
      ("fake_pip = pip:main",),
  ])
  def test_entrypoints_work(entrypoint, script):
      fake_pkg = script.temp_path / "fake_pkg"
      fake_pkg.mkdir()
      fake_pkg.joinpath("setup.py").write_text(dedent("""
      from setuptools import setup
  
      setup(
          name="fake-pip",
          version="0.1.0",
          entry_points={{
              "console_scripts": [
                  {!r}
              ]
          }}
      )
      """.format(entrypoint)))
  
      script.pip("install", "-vvv", str(fake_pkg))
      result = script.pip("-V")
      result2 = script.run("fake_pip", "-V", allow_stderr_warning=True)
      assert result.stdout == result2.stdout
      assert "old script wrapper" in result2.stderr
  
subject: Revert "fix test_entrypoints_work test"