```ruby
$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
require "model_base"
```

Add config to load spec/dummy
user
```ruby
require "simplecov"
SimpleCov.start

# Configure Rails Environment
ENV["RAILS_ENV"] = "test"

require File.expand_path("../../test/dummy/config/environment.rb", __FILE__)
ActiveRecord::Migrator.migrations_paths = [File.expand_path("../../test/dummy/db/migrate", __FILE__)]
ActiveRecord::Migrator.migrations_paths << File.expand_path('../../db/migrate', __FILE__)
require "rails/test_help"

$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
require "model_base"
```
assistant