laravel子域名无法直接访问

Route::get('/', function () {

return view('home.welcome');

});
Route::group(['domain' => 'dashboard.homestead.app'], function () {

Route::get('/', function () {
     return 'hello,world!';
});

});
已经在homestead和hosts里配置了dashboard.homestead.app。但是当访问dashboard.homestead.app显示的仍然是上面路由的的内容(home.welcome).
但是如果写成这样
Route::group(['domain' => 'dashboard.homestead.app'], function () {

Route::get('/test', function () {
     return 'hello,world!';
});

});
访问dashboard.homestead.app／test是正常显示的hello world.
这是为什么？不能直接访问dashboard.homestead.app得到hello world吗？

回复内容：

Route::get('/', function () {

return view('home.welcome');

});
Route::group(['domain' => 'dashboard.homestead.app'], function () {

Route::get('/', function () {
     return 'hello,world!';
});

});
已经在homestead和hosts里配置了dashboard.homestead.app。但是当访问dashboard.homestead.app显示的仍然是上面路由的的内容(home.welcome).
但是如果写成这样
Route::group(['domain' => 'dashboard.homestead.app'], function () {

Route::get('/test', function () {
     return 'hello,world!';
});

});
访问dashboard.homestead.app／test是正常显示的hello world.
这是为什么？不能直接访问dashboard.homestead.app得到hello world吗？