def METHOD_NAME():
    """Test on a custom value for the stains"""
    numpy.random.seed(25)
    absorbance = numpy.random.uniform(size=3)
    expected = numpy.random.uniform(size=(10, 20))
    image = make_image(expected, absorbance)
    workspace, module = make_workspace(
        image, [cellprofiler.modules.unmixcolors.CHOICE_CUSTOM]
    )
    (
        module.outputs[0].red_absorbance.value,
        module.outputs[0].green_absorbance.value,
        module.outputs[0].blue_absorbance.value,
    ) = absorbance
    module.run(workspace)
    image = workspace.image_set.get_image(output_image_name(0))
    numpy.testing.assert_almost_equal(image.pixel_data, expected, 2)