I have bunch of classes 

```
files = ["payment_type","payment_type_ticket_mapping","price_modifier_ticket_delta_mapping","user","revenue_type","revenue_type_group","tax","tax_type","punch"]
files.each {|file| require file }

```

that are required to fulfill the requirement of `Marshal.load` but when I run the rsepc they give me the following error

```
/spec/factories.rb:6: undefined method `admin_login_url' for #<ActionView::Base:0xb62e0228> (ActionView::TemplateError)

```

When I remove that reuire statement it works fine but that statement is necessary for the functionality of `Marshal.load` how to unload the loaded classes by require statement after the work is done.