________ TestArithmetic.test_add_sub[PhysicsSphericalRepresentation] __________
[gw3] linux -- Python 3.7.10 /__w/astropy/astropy/.tox/py37-test/bin/python

self = <astropy.coordinates.tests.test_representation_arithmetic.TestArithmetic object at 0xea71c9ec>
representation = <class 'astropy.coordinates.representation.PhysicsSphericalRepresentation'>

    @pytest.mark.parametrize('representation',
                             (PhysicsSphericalRepresentation,
                              SphericalRepresentation,
                              CylindricalRepresentation))
    def test_add_sub(self, representation):
        in_rep = self.cartesian.represent_as(representation)
        r1 = in_rep + in_rep
        assert isinstance(r1, representation)
        expected = 2. * in_rep
        for component in in_rep.components:
            assert_quantity_allclose(getattr(r1, component),
                                     getattr(expected, component))
        with pytest.raises(TypeError):
            10.*u.m + in_rep
        with pytest.raises(u.UnitsError):
            in_rep + (in_rep / u.s)
        r2 = in_rep - in_rep
        assert isinstance(r2, representation)
        assert_representation_allclose(
>           r2.to_cartesian(), CartesianRepresentation(0.*u.m, 0.*u.m, 0.*u.m))

../../.tox/py37-test/lib/python3.7/site-packages/astropy/coordinates/tests/test_representation_arithmetic.py:218: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../.tox/py37-test/lib/python3.7/site-packages/astropy/coordinates/tests/test_representation_arithmetic.py:27: in assert_representation_allclose
    assert_quantity_allclose(actual_xyz, desired_xyz, rtol, atol, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

actual = <Quantity [[0.00000000e+00, 0.00000000e+00, 0.00000000e+00],
           [0.00000000e+00, 0.00000000e+00, 0.00000000e+0...    [2.71917234e-32, 4.44089210e-16, 2.71917234e-32],
           [0.00000000e+00, 0.00000000e+00, 0.00000000e+00]] kpc>
desired = <Quantity [[0., 0., 0.],
           [0., 0., 0.],
           [0., 0., 0.],
           [0., 0., 0.],
           [0., 0., 0.],
           [0., 0., 0.],
           [0., 0., 0.]] m>
rtol = 1e-07, atol = None, kwargs = {}
np = <module 'numpy' from '/__w/astropy/astropy/.tox/py37-test/lib/python3.7/site-packages/numpy/__init__.py'>
_unquantify_allclose_arguments = <function _unquantify_allclose_arguments at 0xf1122c44>

    def assert_quantity_allclose(actual, desired, rtol=1.e-7, atol=None,
                                 **kwargs):
        """
        Raise an assertion if two objects are not equal up to desired tolerance.
    
        This is a :class:`~astropy.units.Quantity`-aware version of
        :func:`numpy.testing.assert_allclose`.
        """
        import numpy as np
        from astropy.units.quantity import _unquantify_allclose_arguments
        np.testing.assert_allclose(*_unquantify_allclose_arguments(
>           actual, desired, rtol, atol), **kwargs)
E       AssertionError: 
E       Not equal to tolerance rtol=1e-07, atol=0
E       
E       Mismatched elements: 3 / 21 (14.3%)
E       Max absolute difference: 4.4408921e-16
E       Max relative difference: inf
E        x: array([[0.000000e+00, 0.000000e+00, 0.000000e+00],
E              [0.000000e+00, 0.000000e+00, 0.000000e+00],
E              [0.000000e+00, 0.000000e+00, 0.000000e+00],...
E        y: array([[0., 0., 0.],
E              [0., 0., 0.],
E              [0., 0., 0.],...