test suite fails

λ  python setup.py test
running test
================================================ test session starts =================================================
platform linux2 -- Python 2.7.12 -- py-1.4.20 -- pytest-2.5.2
collected 13 items

tests/test_lsmtool.py .........FF..

====================================================== FAILURES ======================================================
_____________________________________________________ test_merge _____________________________________________________

    def test_merge():
        print('Merge patches Patch_0 and Patch_2')
        s.merge(['Patch_0', 'Patch_2'], name = 'merged_patch')
>       assert len(s.getPatchNames()) == 102
E       assert 139 == 102
E        +  where 139 = len(array(['Patch_1', 'Patch_10', 'Patch_100', 'Patch_101', 'Patch_102',\n       'P...      'Patch_97', 'Patch_98', 'Patch_99', 'merged_patch'], \n      dtype='|S50'))
E        +    where array(['Patch_1', 'Patch_10', 'Patch_100', 'Patch_101', 'Patch_102',\n       'P...      'Patch_97', 'Patch_98', 'Patch_99', 'merged_patch'], \n      dtype='|S50') = <bound method SkyModel.getPatchNames of <lsmtool.skymodel.SkyModel object at 0x7fc6c6e03c10>>()
E        +      where <bound method SkyModel.getPatchNames of <lsmtool.skymodel.SkyModel object at 0x7fc6c6e03c10>> = <lsmtool.skymodel.SkyModel object at 0x7fc6c6e03c10>.getPatchNames

tests/test_lsmtool.py:73: AssertionError
-------------------------------------------------- Captured stdout ---------------------------------------------------
Merge patches Patch_0 and Patch_2
_______________________________________________ test_setPatchPositions _______________________________________________

    def test_setPatchPositions():
        print('Set patch positions to midpoint of patch')
        s.setPatchPositions(method='mid')
>       assert round(s.getPatchPositions()['merged_patch'][0].value, 4) == 277.7663
E       assert 274.2124 == 277.7663
E        +  where 274.2124 = round(274.2123791507774, 4)
E        +    where 274.2123791507774 = <Angle 274.2123791507774 deg>.value

tests/test_lsmtool.py:79: AssertionError
-------------------------------------------------- Captured stdout ---------------------------------------------------
Set patch positions to midpoint of patch
======================================== 2 failed, 11 passed in 33.13 seconds ========================================