text: import pytest
  from pypospack.potential import (
          ThreeBodyPotential,
          threebody_potential_names)
  from pypospack.potential.loader import get_3body_potential
  
  @pytest.mark.parametrize('name,symbols',[(k,['Ni']) for k in threebody_potential_names])
  def test__get_pair_potential(name,symbols):
      o = get_3body_potential(name,symbols)
      assert isinstance(o, ThreeBodyPotential)
  