Add newline after each key, value using JSON.stringify()

I want to add a newline after each key value pair in an object using JSON.stringify()

In my actual code I will be getting a lot of key value pairs and having the new lines makes it easier to read.

Example code is:

let test = {'key' : ['one', 'two', 'three'], 'keyTwo' : ['one', 'two', 'three']}

let testOne = JSON.stringify(test, null, 't')

console.log(testOne)

outputs:
{
        "key": [
                "one",
                "two",
                "three"
        ],
        "keyTwo": [
                "one",
                "two",
                "three"
        ]
}

I want:
{
        "key": [
                "one",
                "two",
                "three"
        ],
                                   <----- newline here
        "keyTwo": [
                "one",
                "two",
                "three"
        ]
}

I have tried

let test = {'key' : ['one', 'two', 'three'] + "\n", 'keyTwo' : ['one', 'two', 'three']+ "\n"}

let testOne = JSON.stringify(test, null, 'tn')
console.log(testOne);

Neither work