Is your feature request related to a problem? Please describe.
When running tests in the unit/deprecated directory, deprecation warnings are output. Obviously we know they're deprecated, but we need to ensure that the deprecated functions work the same as they used to for compatibility.

Describe the solution you'd like
Deprecated tests should catch or silence the deprecation warnings. Ideally, tests cases will also ensure that the deprecated functions emit a deprecation warning.

Describe alternatives you've considered
Ignore the output?