Arquillian.json

test.json

{
  "container": {
    "qualifier": "X",
    "configuration": {
      "path": "a",
      "classpath": [
        "a",
        "b"
      ]
    }
  }
}

test.xml

<arquillian>

  <container qualifier="X">
   <configuration>
    <path>a</path>
    <classpath>a</classpath>
    <classpath>a</classpath>
   </configuration>
  </container>

</arquillian>