Failed tests when testing astropy in Anaconda #4171

================================== FAILURES ===================================
____________________________ test_blackbody_scipy _____________________________

    @pytest.mark.skipif("os.environ.get('APPVEYOR')",  reason="fails on AppVeyor")
    @pytest.mark.skipif('not HAS_SCIPY')
    def test_blackbody_scipy():
        """Test Planck function.

        .. note:: Needs ``scipy`` to work.

        """
        flux_unit = u.Watt / (u.m ** 2 * u.um)
        wave = np.logspace(0, 8, 1e6) * u.AA
        temp = 100. * u.K
        with np.errstate(all='ignore'):
            bb_nu = blackbody_nu(wave, temp) * u.sr
        flux = bb_nu.to(flux_unit, u.spectral_density(wave)) / u.sr

        lum = wave.to(u.um)
        intflux = integrate.trapz(flux.value, x=lum.value)
        ans = const.sigma_sb * temp**4 / np.pi
>       np.testing.assert_allclose(intflux, ans.value, rtol=0.01)  # 1% accuracy

astropy\analytic_functions\tests\test_blackbody.py:45:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:1297: in assert_allclose
    verbose=verbose, header=header)
C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:628: in assert_array_compare
    chk_same_position(x_isnan, y_isnan, hasval='nan')
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

x_id = True, y_id = False, hasval = 'nan'

    def chk_same_position(x_id, y_id, hasval='nan'):
        """Handling nan/inf: check that x and y have the nan/inf at the same
            locations."""
        try:
            assert_array_equal(x_id, y_id)
        except AssertionError:
            msg = build_err_msg([x, y],
                                err_msg + '\nx and y %s location mismatch:' \
                                % (hasval), verbose=verbose, header=header,
                                names=('x', 'y'), precision=precision)
>           raise AssertionError(msg)
E           AssertionError:
E           Not equal to tolerance rtol=0.01, atol=0
E
E           x and y nan location mismatch:
E            x: array(nan)
E            y: array(1.8049357842496399)

C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:608: AssertionError
___________________________ test_blackbody_overflow ___________________________

    @pytest.mark.skipif("os.environ.get('APPVEYOR')",  reason="fails on AppVeyor")
    def test_blackbody_overflow():
        """Test Planck function with overflow."""
        photlam = u.photon / (u.cm**2 * u.s * u.AA)
        wave = [0, 1000.0, 100000.0, 1e55]  # Angstrom
        temp = 10000.0  # Kelvin
        with np.errstate(all='ignore'):
            bb_lam = blackbody_lambda(wave, temp) * u.sr
        flux = bb_lam.to(photlam, u.spectral_density(wave * u.AA)) / u.sr

        # First element is NaN, last element is very small, others normal
        assert np.isnan(flux[0])
        assert np.log10(flux[-1].value) < -134
        np.testing.assert_allclose(
            flux.value[1:-1], [3.38131732e+16, 3.87451317e+15],
            rtol=1e-3)  # 0.1% accuracy in PHOTLAM/sr

        with np.errstate(all='ignore'):
            flux = blackbody_lambda(1, 1e4)
>       assert flux.value == 0
E       assert nan == 0
E        +  where nan = <Quantity nan erg / (Angstrom cm2 s sr)>.value

astropy\analytic_functions\tests\test_blackbody.py:67: AssertionError
___________________________ test_blackbody_synphot ____________________________

    @pytest.mark.skipif("os.environ.get('APPVEYOR')",  reason="fails on AppVeyor")
    def test_blackbody_synphot():
        """Test that it is consistent with IRAF SYNPHOT BBFUNC."""
        # Solid angle of solar radius at 1 kpc
        fac = np.pi * (const.R_sun / const.kpc) ** 2 * u.sr

        with np.errstate(all='ignore'):
            flux = blackbody_nu([100, 1, 1000, 1e4, 1e5] * u.AA, 5000) * fac
        assert flux.unit == FNU

        # Special check for overflow value (SYNPHOT gives 0)
        assert np.log10(flux[0].value) < -143

        np.testing.assert_allclose(
            flux.value[1:], [0, 2.01950807e-34, 3.78584515e-26, 1.90431881e-27],
>           rtol=0.01)  # 1% accuracy

astropy\analytic_functions\tests\test_blackbody.py:85:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:1297: in assert_allclose
    verbose=verbose, header=header)
C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:628: in assert_array_compare
    chk_same_position(x_isnan, y_isnan, hasval='nan')
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

x_id = array([ True, False, False, False], dtype=bool)
y_id = array([False, False, False, False], dtype=bool), hasval = 'nan'

    def chk_same_position(x_id, y_id, hasval='nan'):
        """Handling nan/inf: check that x and y have the nan/inf at the same
            locations."""
        try:
            assert_array_equal(x_id, y_id)
        except AssertionError:
            msg = build_err_msg([x, y],
                                err_msg + '\nx and y %s location mismatch:' \
                                % (hasval), verbose=verbose, header=header,
                                names=('x', 'y'), precision=precision)
>           raise AssertionError(msg)
E           AssertionError:
E           Not equal to tolerance rtol=0.01, atol=0
E
E           x and y nan location mismatch:
E            x: array([           nan,   2.018840e-34,   3.781005e-26,   1.901751e-27])
E            y: array([  0.000000e+00,   2.019508e-34,   3.785845e-26,   1.904319e-27])

C:\Users\User\Anaconda3\envs\astropydev\lib\site-packages\numpy\testing\utils.py:608: AssertionError
 3 failed, 9217 passed, 158 skipped, 76 xfailed, 2 xpassed in 1399.32 seconds =