issue_comments: 823260631

this seems to be something in pytest.raises: python with pytest.raises(error) as excinfo: ... behaves different from python with pytest.raises(error): ... so the test will pass for the former but not the latter.

Actually, I can reproduce without involving open_dataset (or xarray) at all: replacing it with calls to open_ will still close and show the exact same behavior. For reference, this will fail on the second assert: ```python import pytest import scipy.io

def open_(f): return scipy.io.netcdf_file(f, mode="r", version=2)

def test_open(): filename = "file.nc" with open(filename, mode="w") as f: f.write("abcdefghijklmnopqrstuvwxyz")

with open(filename, mode="rb") as f:
    with pytest.raises(TypeError) as excinfo:
        open_(f)
    assert not f.closed, "first file closed"

with open(filename, mode="rb") as f:
    with pytest.raises(TypeError):
        open_(f)
    assert not f.closed, "second file closed"

```

Edit: I tried asking the scipy devs, see scipy/scipy#13905