old_contents: """Execute exactly this copy of pip, within a different environment.
  
  This file is named as it is, to ensure that this module can't be imported via
  an import statement.
  """
  
  import runpy
  import sys
  import types
  from importlib.machinery import ModuleSpec, PathFinder
  from os.path import dirname
  from typing import Optional, Sequence, Union
  
  PIP_SOURCES_ROOT = dirname(dirname(__file__))
  
  
  class PipImportRedirectingFinder:
      @classmethod
      def find_spec(
          self,
          fullname: str,
          path: Optional[Sequence[Union[bytes, str]]] = None,
          target: Optional[types.ModuleType] = None,
      ) -> Optional[ModuleSpec]:
          if fullname != "pip":
              return None
  
          spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
          assert spec, (PIP_SOURCES_ROOT, fullname)
          return spec
  
  
  sys.meta_path.insert(0, PipImportRedirectingFinder())
  
  assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
  runpy.run_module("pip", run_name="__main__", alter_sys=True)
  
new_contents: """Execute exactly this copy of pip, within a different environment.
  
  This file is named as it is, to ensure that this module can't be imported via
  an import statement.
  """
  
  import runpy
  import sys
  import types
  from importlib.machinery import ModuleSpec, PathFinder
  from os.path import dirname
  from typing import Optional, Sequence, Union
  
  PIP_SOURCES_ROOT = dirname(dirname(__file__))
  
  
  class PipImportRedirectingFinder:
      @classmethod
      def find_spec(
          self,
          fullname: str,
          path: Optional[Sequence[Union[bytes, str]]] = None,
          target: Optional[types.ModuleType] = None,
      ) -> Optional[ModuleSpec]:
          if fullname != "pip":
              return None
  
          spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
          assert spec, (PIP_SOURCES_ROOT, fullname)
          return spec
  
  
  # TODO https://github.com/pypa/pip/issues/11294
  sys.meta_path.insert(0, PipImportRedirectingFinder())
  
  assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
  runpy.run_module("pip", run_name="__main__", alter_sys=True)
  
subject: Change something so tests are not skipped