Fix window test

Author: dcherian

doc/whats-new.rst

@@ -61,7 +61,7 @@ Internal Changes
 - Use Python 3.6 idioms throughout the codebase. (:pull:3419)
   By `Maximilian Roos <https://github.com/max-sixty>`_
 - Implement :py:func:`__dask_tokenize__` for xarray objects.
-  By `Deepak Cherian <https://github.com/dcherian>`_
+  By `Deepak Cherian <https://github.com/dcherian>`_ and `Guido Imperiale <https://github.com/crusaderky>`_.
 
 .. _whats-new.0.14.0:
 

xarray/tests/test_dask.py

@@ -1,5 +1,6 @@
 import operator
 import pickle
+import sys
 from contextlib import suppress
 from distutils.version import LooseVersion
 from textwrap import dedent
@@ -28,6 +29,8 @@
 da = pytest.importorskip("dask.array")
 dd = pytest.importorskip("dask.dataframe")
 
+ON_WINDOWS = sys.platform == "win32"
+
 
 class CountingScheduler:
     """ Simple dask scheduler counting the number of computes.
@@ -1186,7 +1189,7 @@ def test_normalize_token_identical(obj, transform):
 
 
 def test_normalize_token_netcdf_backend(map_ds):
-    with create_tmp_file() as tmp_file:
+    with create_tmp_file(allow_cleanup_failure=ON_WINDOWS) as tmp_file:
         map_ds.to_netcdf(tmp_file)
         read = xr.open_dataset(tmp_file)
         assert not dask.base.tokenize(map_ds) == dask.base.tokenize(read)