denoland-deno/tests/specs/test/default_ts/__test__.jsonc

{
  "tempDir": true,
  "tests": {
    "ext_flag": {
      "args": "test --ext=ts as_ts.js",
      "output": "ext.out"
    },
    "extensionless": {
      "args": "test extensionless",
      "output": "extensionless.out"
    }
  }
}