message: get default test env from defaults object
diff: @@ -418,7 +418,7 @@ export default function normalize(options: InitialOptions, argv: Argv) {
  options.testEnvironment = getTestEnvironment({
  rootDir: options.rootDir,
  - testEnvironment: options.testEnvironment || 'jsdom',
  + testEnvironment: options.testEnvironment || DEFAULT_CONFIG.testEnvironment,
  });
  if (!options.roots && options.testPathDirs) {
  