test mutability = immutable

[PFUTSG]

Hello,

I added the Login attribute to the User schema, with the parameter "mutability": "immutable"

    {
      "name": "Login",
      "type": "string",
      "multiValued": false,
      "description": "Username limited to 30 characters by server-side validation",
      "required": true,
      "caseExact": false,
      "mutability": "immutable",
      "returned": "default",
      "uniqueness": "server"
    },

coreUserSchema.json

Despite this, I note that the test which checks the value replacement of all user attributes does not take into account the value of the parameter "mutability".

"Login":"QIXTAL" replaced by "CNRUEZ" in the test.

PATCH _Users_Id_details (1).json

Is this normal?

Thank you in advance for your reply.