[
  {
    "title": "`$ref` and `$defs`",
    "schema": {
      "$ref": "#/$defs/foo",
      "$defs": {
        "foo": { "title": "Foo" }
      }
    },
    "subjects": [
      {
        "instance": "foo",
        "assertions": [
          {
            "location": "#",
            "keyword": "$ref",
            "expected": []
          },
          {
            "location": "#",
            "keyword": "$defs",
            "expected": []
          },
          {
            "location": "#",
            "keyword": "title",
            "expected": ["Foo"]
          }
        ]
      }
    ]
  }
]