why is TestMMTest.ts not valid pascal case? (`unicorn/filename-case`)

[salisbury-espinosa]

TestMMTest.ts
  1:1   error    Filename is not in pascal case. Rename it to `TestMmTest.ts`  unicorn/filename-case

why?
MM - an abbreviation of two words beginning with M,

example of correct validation
https://github.com/sindresorhus/type-fest/blob/main/source/pascal-case.d.ts

import type { PascalCase } from 'type-fest';

// TestMMTest - CORRECT!!!!!!
const someVariable: PascalCase<'test-MM-test'> = 'TestMMTest';

[sindresorhus]

The general convention in JS is to treat acronyms in names as whole words, i.e. use loadHttpUrl, not loadHTTPURL, unless required by a platform name (e.g.
XMLHttpRequest)