test_periodic_reference fails on ppc64le python 3.7 (conda feedstock)

[step21]

Description

ppc64le python 3.7
test_periodic_reference

Way to reproduce

Run tests on ppc64le with python 3.7

Version information

# Paste the output of the following python commands

python 3.7

[step21]

___________________________ test_periodic_reference ____________________________

    def test_periodic_reference():
        img = data.astronaut()
        img = rgb2gray(img)
        s = np.linspace(0, 2*np.pi, 400)
        r = 100 + 100*np.sin(s)
        c = 220 + 100*np.cos(s)
        init = np.array([r, c]).T
        snake = active_contour(gaussian(img, 3), init, alpha=0.015, beta=10,
                               w_line=0, w_edge=1, gamma=0.001, coordinates='rc')
        refr = [98, 99, 100, 101, 102, 103, 104, 105, 106, 108]
        refc = [299, 298, 298, 298, 298, 297, 297, 296, 296, 295]

>       assert_equal(np.array(snake[:10, 0], dtype=np.int32), refr)
E       AssertionError: 
E       Arrays are not equal
E       
E       Mismatched elements: 10 / 10 (100%)
E       Max absolute difference: 1762
E       Max relative difference: 17.9183673469
E        x: array([1854, 1855, 1858, 1860, 1862, 1863, 1865, 1867, 1868, 1870],
E             dtype=int32)
E        y: array([ 98,  99, 100, 101, 102, 103, 104, 105, 106, 108])
../_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pla/lib/python3.6/site-packages/skimage/segmentation/tests/test_active_contour_model.py:23: AssertionError

https://travis-ci.com/github/conda-forge/scikit-image-feedstock/jobs/344046594

https://travis-ci.com/github/conda-forge/scikit-image-feedstock/jobs/342627804