code: def test_as_rgb_shape_mismatch():
      np.random.seed(2323)
      r = np.random.randint(12, 121, size=(8, 8))
      g = np.random.randint(12, 121, size=(8, 8))
      b = np.random.randint(12, 121, size=(8, 6))
      with pytest.raises(ValueError):
          mahotas.as_rgb(r, g, b)
  
file_path: mahotas/mahotas/tests/test_stretch.py
imports: from mahotas.stretch import stretch
  import mahotas
  import mahotas
  import pytest
  import numpy
label_desc: Use image node_id 5 for calling a global function with example usage: test_as_rgb_shape_mismatch() without return types