Question: Is there any way in which I can say, define a URI that will be used in different .yml files for different Artillery load tests?

I am wanting to use the same URI within a number of .yml files to define the `target` within the `config` section.

I saw the following on the [Artillery docs](https://artillery.io/docs/script-reference/):

> 
> Values can be set dynamically via environment variables which are available under $processEnvironment template variable.
> 
> 
> For example, to set a default HTTP header for all requests via the SERVICE\_API\_KEY environment variable
> 
> 
> 

They show an example doc of:

> 
> export SERVICE\_API\_KEY="012345-my-api-key"
> 
> 
> artillery run my-test.yml
> 
> 
> 

However I am unsure of how to implement this, as I am using the package.json file to run the `artillery run my-test.yml` command.

Answer: 
Figured this out on my own:

In package.json make a new script. Call it whatever you like, and do something similar to this:

```
"scripts": {
    "start": "set ENV=https://yoursite.com&&artillery run -k yourtest.yml"
}

```

in the .yml file itself something like this:

```
config:
  target: "{{$processEnvironment.ENV}}"

```

call it like this:

```
npm run start

```
IDK why but for me export worked, I mean:

```
"scripts": {
    "start": "export ENV=https://yoursite.com&&artillery run -k yourtest.yml"
}

```