adapt fill_val definition

satpy/tests/reader_tests/test_mviri_l1b_fiduceo_nc.py

@@ -20,7 +20,6 @@
 from __future__ import annotations
 
 import os
-import sys
 from unittest import mock
 
 import dask.array as da
@@ -45,7 +44,7 @@
 # The following fixtures are not defined in this file, but are used and injected by Pytest:
 # - request
 
-fill_val = min(sys.maxsize, 4294967295) # FillValue defined to be windows-compatible
+fill_val = np.uint32(4294967295) # FillValue defined to be windows-compatible
 
 attrs_exp: dict = {
     "platform": "MET7",