@agramfort I think we should eventually migrate many of our testing calls to `assert_array_almost_equal()` to `assert_allclose()`. They both have valid and appropriate uses in different contexts, but I think that some of the times we've used `assert_array_almost_equal()` we've actually wanted to say `assert_allclose()`. In this example, assert_array_almost_equal would not check the meg channels at all, actually, since they are all fewer than 7 decimals. Think of an MEG channel that got blown up by a factor of 1e5, for example, this test passes:
```
np.testing.assert_array_almost_equal([1e-11], [1e-6])
```
Anyway, just something to consider when we go through and design tests moving forward. I've modified the tests in a way I think sane in this version of `test_raw.py`, see what you think.