This is the line Travis is choking on.

NumPy imports the full `.testing` package without needing to be asked, so after the prior line you can just use `np.testing.assert_*` without any additional imports.

Also, pursuant to [the NumPy docs](http://docs.scipy.org/doc/numpy/reference/generated/numpy.testing.assert_array_almost_equal.html) you might want to consider using `np.testing.assert_allclose` for better approximately equal comparisons between floating point arrays.