Datasource output without "pretty" characters of a JSON

Hi,
When i execute my bash script from any terminal the output is a formated JSON with newlines and spaces to make it human friendly, as this example:

{
"test": null
}

When i run it from the datasource menu using "Test Against a Device" buttom, Zenoss seems removing any "format" i try to give to it, like exmaple below

{ "test": null }

I guess Zenoss is doing it intentionally, i'm right if yes, is there any way to avoid it

Thanks in advance