html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/5680#issuecomment-894819235,https://api.github.com/repos/pydata/xarray/issues/5680,894819235,IC_kwDOAMm_X841Vduj,44147817,2021-08-08T16:07:54Z,2021-08-08T16:07:54Z,CONTRIBUTOR,"I would have liked to add the dictionary in `xarray.conventions` but this causes circular imports.

It seems that a lot of test failures are caused by something like:
```python
> xarray.core.dtypes.maybe_promote(dtype('int64'))

(dtype('float64'), nan
````

So the answer to [this](https://github.com/pydata/xarray/pull/5680#issue-705713175) must really be yes, am I right?
> From the issue's conversation, it wasn't clear to me whether an argument should control the use of the default fill value. Since some tests fail now I guess the answer is yes.

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