Deprecation warnings appear in unit test output

[clintoncwolfe]

Describe the problem

About 150 lines similar to the following appear in the unit test output:

DEPRECATED: global use of must_be from /workdir/test/unit/unit_helper.rb:25. Use _(obj).must_be instead. This will fail in Minitest 6.
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  | DEPRECATED: global use of wont_be_empty from /workdir/test/unit/unit_helper.rb:26. Use _(obj).wont_be_empty instead. This will fail in Minitest 6.
  | DEPRECATED: global use of wont_be_empty from /workdir/test/unit/unit_helper.rb:27. Use _(obj).wont_be_empty instead. This will fail in Minitest 6.
  | DEPRECATED: global use of wont_be_empty from /workdir/test/unit/unit_helper.rb:28. Use _(obj).wont_be_empty instead. This will fail in Minitest 6.

Possible Solution