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FAILURES: TestUtilMode.test_mode_pil_image -- conda update astropy

See original GitHub issue

I have updated my astropy version running

> conda update astropy

Then, to test the installed version of astropy I ran the function astropy.test() and I got this error:

========================================================================== FAILURES ==========================================================================
______________________________________________________________ TestUtilMode.test_mode_pil_image ______________________________________________________________

self = <astropy.io.fits.tests.test_util.TestUtilMode object at 0x1181cb190>

    @pytest.mark.skipif("not HAS_PIL")
    def test_mode_pil_image(self):
        img = np.random.randint(0, 255, (5, 5, 3)).astype(np.uint8)
        result = Image.fromarray(img)
    
        result.save(self.temp('test_simple.jpg'))
        # PIL doesn't support append mode. So it will allways use binary read.
>       with Image.open(self.temp('test_simple.jpg')) as fileobj:

anaconda/lib/python2.7/site-packages/astropy/io/fits/tests/test_util.py:91: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=5x5 at 0x112DBF8C0>, name = '__exit__'

    def __getattr__(self, name):
        if name == "__array_interface__":
            # numpy array interface support
            new = {}
            shape, typestr = _conv_type_shape(self)
            new['shape'] = shape
            new['typestr'] = typestr
            new['data'] = self.tostring()
            return new
>       raise AttributeError(name)
E       AttributeError: __exit__

anaconda/lib/python2.7/site-packages/PIL/Image.py:512: AttributeError
======================================== 1 failed, 11357 passed, 177 skipped, 43 xfailed, 3 xpassed in 387.18 seconds ========================================
1

Is there something I can do to fix the problem?