Handle various warnings in tests in unreleased version (dev branch) #1006
Description
Test coverage is 100% on outputs. However, we have a number of warnings appearing during test execution on our dev branch. Warnings will typically indicate some form of informational notice that doesn't detract from correctness. There are a broad range of reasons they might exist.
We should either handle them in the test (e.g. with pytest.warns(UserWarning) or fix our implementation if there is an implementation issue or refinement. At a glance, these warnings appear to be in line with expected test results, and have probably been overlooked rather than representing a correctness problem.