angular-cn/packages/core/schematics/test/test-migrations.json

{
  // Migrations which are not publicly enabled but still run as part of tests need to
  // be part of a schematic collection in order to be able to run it.
  "schematics": {
    "migration-injectable-pipe": {
      "description": "Migrates all Pipe classes so that they have an Injectable annotation",
      "factory": "../migrations/injectable-pipe/index"
    }
  }
}