Current python pytest scripts include logic that *always* skips some tests - annoying!

The current Python pytest script _**test_examples.py**_ contains a test "test_passthrough"  that will *always* report it is skipping some tests because tested modules do not support writeback.

This is confusing, annoying, and strange.

Recommend:  Separate the "passthrough" tests which do not test writeback into their own test case, so that this does not occur.