code: def test_zscore_nan_policy_raise(self, dtype):
      for xp, scp in [(numpy, scipy), (cupy, cupyx.scipy)]:
          x = xp.array([1, 2, 3, xp.nan], dtype=dtype)
          with pytest.raises(ValueError):
              scp.stats.zscore(x, nan_policy="raise")
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  import cupyx
  import cupyx.scipy.stats
label_desc: Use image node_id 13 for calling the TestZscore obj's underlying member method code with example usage: obj.test_zscore_nan_policy_raise(dtype) without return types