Equivalent crystal vector test fails on conda-forge build

[hakonanes]

Describe the bug
A test for equivalent crystal vectors fail in a recent conda-forge build:

FAILED tests/crystallography/test_get_hkl.py::TestGetHKL::test_get_equivalent_hkl - assert array([12]) == 6
 +  where 6 = ReciprocalLatticeVector (6,),  (6mm)\n[[ 2.  2.  0.]\n [-4.  2.  0.]\n [ 2. -4.  0.]\n [-2. -2.  0.]\n [ 4. -2.  0.]\n [-2.  4.  0.]].size
 +    where ReciprocalLatticeVector (6,),  (6mm)\n[[ 2.  2.  0.]\n [-4.  2.  0.]\n [ 2. -4.  0.]\n [-2. -2.  0.]\n [ 4. -2.  0.]\n [-2.  4.  0.]] = symmetrise()
 +      where symmetrise = ReciprocalLatticeVector (1,),  (6mm)\n[[2. 2. 0.]].symmetrise

[hakonanes]

I'm skipping the test on conda-forge for now.