pkg/test_runner/test/test_matrix.json

{
  "configurations": {
    "invalid-vm-android-simarm": {},
    "valid-dart2js-chrome": {},
    "valid-dart2js-safari": {},
    "vm-aot": {
      "options": {
        "compiler": "dartkp"
      }
    },
    "vm-legacy": {},
    "vm-strong": {}
  }
}