Summary

When running the test suite over portions that show() a test, the GUI window pops up and takes precedence. It would be nice to have these pop up in the background and not take priority.

pytest -n 4 lib/matplotlib/tests/test_backends_interactive.py and go to a different window and you'll still have the figure windows popping up in front of it.

Proposed fix

I thought setting the figure.raise_window rcParam to False would help here, but apparently not on the first show?