I need to get current exact collection variable value.

In pre-request script of a postman request I'm setting **2 collection variables** as follows

```
pm.collectionVariables.set("firstCollectionVariable", "string_{{$guid}}");
pm.collectionVariables.set("secondCollectionVariable", "second_variable_{{firstCollectionVariable}}");

```

then I'm using those 2 collection variables in a post request body to set specific data as follows

```
 { 
    "firstKey": {{firstCollectionVariable}},
    "secondKey" : {{secondCollectionVariable}},
 }

```

firstKey and secondKey are set as expected

firstKey => "string\_c6631d2c-2427-4903-b604-8120662a5e0e"

secondKey => "second\_variable\_string\_c6631d2c-2427-4903-b604-8120662a5e0e"

The problem is when I'm trying to check the response using

```
pm.expect(pm.response.secondKey).to.eql(pm.collectionVariables.get("secondCollectionVariable"));

```

I got assertion error

> 
> AssertionError: expected
> 'second\_variable\_string\_c6631d2c-2427-4903-b604-8120662a5e0e' to
> deeply equal 'second\_variable\_{{firstCollectionVariable}}'
> 
> 
> 

How I can get the current exact value of collection variable?