Updated bundled py.test to 2.8.3 - #4349

python -c 'from astropy import test; test("modeling"); test("modeling")'

...
Platform: Darwin-12.5.0-x86_64-i386-64bit

Executable: /Users/tom/miniconda3/envs/production/bin/python

Full Python Version: 
3.4.3 |Continuum Analytics, Inc.| (default, Oct 20 2015, 14:27:51) 
[GCC 4.2.1 (Apple Inc. build 5577)]

encodings: sys: utf-8, locale: UTF-8, filesystem: utf-8
byteorder: little
float info: dig: 15, mant_dig: 15

Numpy: 1.10.1
Scipy: 0.16.0
Matplotlib: 1.5.0
h5py: 2.5.0
...
========================================================================================== FAILURES ==========================================================================================
______________________________________________________________________________ test_inherit_constraints[model0] ______________________________________________________________________________

model = <CompoundModel11(amplitude_0=1.0, mean_0=0.0, stddev_0=1.0, amplitude_1=1.0, mean_1=0.0, stddev_1=1.0)>

    @pytest.mark.parametrize('model',
            [Gaussian1D(bounds={'stddev': (0, 0.3)}, fixed={'mean': True}) +
                Gaussian1D(fixed={'mean': True}),
             (_ConstraintsTestA + _ConstraintsTestB)()])
    def test_inherit_constraints(model):
        """
        Various tests for copying of constraint values between compound models and
        their members.

        There are two versions of this test: One where a compound model is created
        from two model instances, and another where a compound model is created
        from two model classes that have default constraints set on some of their
        parameters.

        Regression test for https://github.com/astropy/astropy/issues/3481
        """

        # Lots of assertions in this test as there are multiple interfaces to
        # parameter constraints

        assert 'stddev_0' in model.bounds
>       assert model.bounds['stddev_0'] == (0, 0.3)
E       assert (0.1, 0.5) == (0, 0.3)
E         At index 0 diff: 0.1 != 0
E         Use -v to get the full diff

miniconda3/envs/production/lib/python3.4/site-packages/astropy-1.1.dev14144-py3.4-macosx-10.5-x86_64.egg/astropy/modeling/tests/test_compound.py:759: AssertionError
______________________________________________________________________________ test_inherit_constraints[model1] ______________________________________________________________________________

model = <CompoundModel12(stddev_0=0.0, mean_0=0.0, mean_1=0.0)>

    @pytest.mark.parametrize('model',
            [Gaussian1D(bounds={'stddev': (0, 0.3)}, fixed={'mean': True}) +
                Gaussian1D(fixed={'mean': True}),
             (_ConstraintsTestA + _ConstraintsTestB)()])
    def test_inherit_constraints(model):
        """
        Various tests for copying of constraint values between compound models and
        their members.

        There are two versions of this test: One where a compound model is created
        from two model instances, and another where a compound model is created
        from two model classes that have default constraints set on some of their
        parameters.

        Regression test for https://github.com/astropy/astropy/issues/3481
        """

        # Lots of assertions in this test as there are multiple interfaces to
        # parameter constraints

        assert 'stddev_0' in model.bounds
>       assert model.bounds['stddev_0'] == (0, 0.3)
E       assert (0.1, 0.5) == (0, 0.3)
E         At index 0 diff: 0.1 != 0
E         Use -v to get the full diff

miniconda3/envs/production/lib/python3.4/site-packages/astropy-1.1.dev14144-py3.4-macosx-10.5-x86_64.egg/astropy/modeling/tests/test_compound.py:759: AssertionError
===================================================================== 2 failed, 486 passed, 34 skipped in 31.85 seconds ======================================================================