don't test remote paths if windows

tests/trainer/test_trainer.py

@@ -1,6 +1,7 @@
 import glob
 import math
 import os
+import platform
 import pickle
 import sys
 import types
@@ -968,7 +969,10 @@ def aws_credentials():
     os.environ['AWS_SESSION_TOKEN'] = 'testing'
 
 
-@pytest.mark.skipif(version.parse(tensorboard.__version__) < version.parse('2.0'), reason="remote paths require tensorboard>=2.0")
+@pytest.mark.skipif(platform.system() == "Windows",
+                    reason="Saving to remote paths is not supported on Windows")
+@pytest.mark.skipif(version.parse(tensorboard.__version__) < version.parse('2.0'),
+                    reason="remote paths require tensorboard>=2.0")
 def test_trainer_s3_path(aws_credentials):
     model = EvalModelTemplate()
     with mock_s3():