angular/modules/@angular/core/tsconfig-testing.json

{
  "extends": "./tsconfig-build",

  "compilerOptions": {
    "paths": {
      "rxjs/*": ["../../../node_modules/rxjs/*"],
      "@angular/core": ["../../../dist/packages-dist/core"]
    }
  },
  "files": [
    "testing/index.ts",
    "../../../node_modules/zone.js/dist/zone.js.d.ts",
    "../../system.d.ts"
  ],
  "angularCompilerOptions": {
    "strictMetadataEmit": true
  }
}