The description says if same return same, but the test says it should return Same.

Ruby 3.0 should be enabled.

The kata is far too unspecific about what is considered an invalid entry (at least for Ruby).
There should either be example tests showing what's expects or it should be explicitly mentioned in the description.
Of course, all tests should also follow these criteria.

The JS version does something very weird with datatypes, which is not specified in the Description and which I have absolutely no inclination to reverse engineer.

Also, the tests use Test.assertSimilar instead of Test.assertDeepEquals, so any difference between numbers and strings is lost in rendering test results.

My honest opinion of this kata is quite unprintable.

Needs random test cases to prevent low-level cheat solutions