Hi,

Can someone help, I keep hitting the same error, insert failed. DML operation on setup object is not permitted after you have updated a non-setup object(or vice versa: User, original object: Account:[].  I am trying to test that the account owner is the same, that the account owner is not the same anymore, so the account owner has changed. Help please.  This is my test class:

@isTest
private class testAccOwner {
    public static testMethod void testAccOwnerChange() 
    {
    test.startTest();
        
	Account acc = new Account(Name = 'test01', OwnerId = 'xxxxxxx001');

    insert acc;
      
        User testUser2 = [Select Id from User where IsActive = true limit 1];
        User testUser3 = [Select Id from User where IsActive = true limit 1];
         
    
    	User testUser1 = new User(alias = 'TstUsr1',Firstname='tst1', email='newuserDP@testorg.com', emailencodingkey='UTF-8', lastname='Tst11', languagelocalekey='en_US', localesidkey='en_US', profileid = 'xxxxxxx006', timezonesidkey='America/Los_Angeles', username='newuser11@testorg.com', UserRoleId = 'xxxxxxx006',Country_picklist__c = 'UNITED STATES',
        Global_Region__c  = 'US', DIRECTOR_NM__c=testUser2.id, ManagerId = testUser3.Id);
        insert testUser1;
        
        System.runAs(testUser1){
        
        acc.OwnerId = testUser1.Id;
        acc.OwnerId = 'xxxxxxx001';
        acc.Previous_Account_Owner__c = 'xxxxxxx001';
        acc.Previous_Account_Owner_s_Manager__c = testUser1.ManagerId;
        acc.New_Account_Owner_s_Manager__c = testUser2.ManagerId;
        acc.OwnerId = testUser2.Id;
        }
        update acc;
        /*System.runAs(u){
			Account acc1 = new Account();
            acc1.OwnerId = 'xxxxxxx001';
            acc1.Name = 'Test091';
            insert acc1;
            
            acc= [select id, ownerId from Account where id=:acc.id];
            system.assert(acc1.OwnerId == acc.OwnerId);
        }*/
        test.stopTest();
    }
}