decorate the some of the failing tests with requires_dask

Author: keewis

xarray/tests/test_backends.py

@@ -3513,6 +3513,7 @@ def test_uamiv_format_read(self):
         assert_allclose(expected, actual)
         camxfile.close()
 
+    @requires_dask
     def test_uamiv_format_mfread(self):
         """
         Open a CAMx file and test data variables
@@ -4012,6 +4013,7 @@ def test_geotiff_tags(self):
             with xr.open_rasterio(tmp_file) as rioda:
                 assert isinstance(rioda.attrs["AREA_OR_POINT"], str)
 
+    @requires_dask
     def test_no_mftime(self):
         # rasterio can accept "filename" urguments that are actually urls,
         # including paths to remote files.

xarray/tests/test_sparse.py

@@ -837,6 +837,7 @@ def test_sparse_coords(self):
         )
 
 
+@requires_dask
 def test_chunk():
     s = sparse.COO.from_numpy(np.array([0, 0, 1, 2]))
     a = DataArray(s)