old_contents: from .checks import (check_quantity,
                       check_relativistic,
                       _check_quantity,
                       _check_relativistic)
  
  from .exceptions import (PlasmaPyError,
                           PhysicsError,
                           RelativityError,
                           AtomicError,
                           MissingAtomicDataError,
                           ChargeError,
                           InvalidIonError,
                           InvalidIsotopeError,
                           InvalidElementError,
                           InvalidParticleError,
                           PlasmaPyWarning,
                           PhysicsWarning,
                           RelativityWarning,
                           AtomicWarning,
                           MissingAtomicDataWarning)
  
  from .import_helpers import check_versions
  
  from .pytest_helpers import (
      run_test,
      call_string,
      InconsistentTypeError,
      UnexpectedResultError,
      UnexpectedExceptionError,
      RunTestError,
      IncorrectResultError,
      MissingExceptionError,
      MissingWarningError,
  )
  
new_contents: from .checks import (check_quantity,
                       check_relativistic,
                       _check_quantity,
                       _check_relativistic)
  
  from .exceptions import (PlasmaPyError,
                           PhysicsError,
                           RelativityError,
                           AtomicError,
                           MissingAtomicDataError,
                           ChargeError,
                           InvalidIonError,
                           InvalidIsotopeError,
                           InvalidElementError,
                           InvalidParticleError,
                           PlasmaPyWarning,
                           PhysicsWarning,
                           RelativityWarning,
                           AtomicWarning,
                           MissingAtomicDataWarning)
  
  from .import_helpers import check_versions
  
  from .pytest_helpers import (
      run_test,
      run_test_equivalent_calls,
      call_string,
      InconsistentTypeError,
      UnexpectedResultError,
      UnexpectedExceptionError,
      RunTestError,
      IncorrectResultError,
      MissingExceptionError,
      MissingWarningError,
  )
  
subject: Add equivalent call test helper to utils/__init__.py