System.QueryException: Didn't understand relationship 'account' in field path.

System.QueryException: Didn't understand relationship 'account' in field path. If you are attempting to use a custom relationship, be sure to append the '__r' after the custom relationship name. Please reference your WSDL or the describe call for the appropriate names.

When I run the test classes, test classes are failing with the above errors! Any threads/Pointers will be appreciated.

Please find the code below:

Class

*Public Class ClassName{
 Public ClassName(){
  // getting current login user record
  User userrecord = [select id,Name,accountId,account.parentId,profile.Name 
  from User where id =: UserInfo.getUserId()];  // exception occurring at this line
}
//and other logic
}*

Test Class

*@isTest(seealldata = false)
public class ClassName_UT{
    static testmethod void testMethodOne(){
        // User creation --> CommunityUserObj (we have some utility classes for creating objects)

        test.startTest();
        system.runas(CommunityUserObj){
        ClassName objName= new ClassName(); // exception occurring at this line
        test.stopTest();
    }

   }
}*

Thanks