diff --git a/activerecord/test/cases/adapters/mysql2/explain_test.rb b/activerecord/test/cases/adapters/mysql2/explain_test.rb
index 675703caa1..f67f21fab1 100644
--- a/activerecord/test/cases/adapters/mysql2/explain_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/explain_test.rb
@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/developer'
+require 'models/computer'
 
 module ActiveRecord
   module ConnectionAdapters
diff --git a/activerecord/test/cases/adapters/postgresql/explain_test.rb b/activerecord/test/cases/adapters/postgresql/explain_test.rb
index 19053b6732..d2dd04b84b 100644
--- a/activerecord/test/cases/adapters/postgresql/explain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/explain_test.rb
@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/developer'
+require 'models/computer'
 
 module ActiveRecord
   module ConnectionAdapters
diff --git a/activerecord/test/cases/adapters/sqlite3/explain_test.rb b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
index f1d6119d2e..de6e35ef57 100644
--- a/activerecord/test/cases/adapters/sqlite3/explain_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/developer'
+require 'models/computer'
 
 module ActiveRecord
   module ConnectionAdapters
diff --git a/activerecord/test/cases/associations/belongs_to_associations_test.rb b/activerecord/test/cases/associations/belongs_to_associations_test.rb
index bcd0cf82d5..17394cb6f7 100644
--- a/activerecord/test/cases/associations/belongs_to_associations_test.rb
+++ b/activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -1,5 +1,6 @@
 require 'cases/helper'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/topic'
diff --git a/activerecord/test/cases/associations/callbacks_test.rb b/activerecord/test/cases/associations/callbacks_test.rb
index 5b7e462f64..a531e0e02c 100644
--- a/activerecord/test/cases/associations/callbacks_test.rb
+++ b/activerecord/test/cases/associations/callbacks_test.rb
@@ -3,6 +3,7 @@ require 'models/post'
 require 'models/author'
 require 'models/project'
 require 'models/developer'
+require 'models/computer'
 require 'models/company'
 
 class AssociationCallbacksTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb
index 8234ee95be..4539b99504 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -17,6 +17,7 @@ require 'models/subscriber'
 require 'models/subscription'
 require 'models/book'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/member'
 require 'models/membership'
diff --git a/activerecord/test/cases/associations/extension_test.rb b/activerecord/test/cases/associations/extension_test.rb
index 4c1fdfdd9a..9d373cd73b 100644
--- a/activerecord/test/cases/associations/extension_test.rb
+++ b/activerecord/test/cases/associations/extension_test.rb
@@ -3,6 +3,7 @@ require 'models/post'
 require 'models/comment'
 require 'models/project'
 require 'models/developer'
+require 'models/computer'
 require 'models/company_in_module'
 
 class AssociationsExtensionsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/has_many_associations_test.rb b/activerecord/test/cases/associations/has_many_associations_test.rb
index 69f7bde4bc..5a963b6458 100644
--- a/activerecord/test/cases/associations/has_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_associations_test.rb
@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/contract'
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index cddf1a1f72..df4a30ae9b 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -15,6 +15,7 @@ require 'models/toy'
 require 'models/contract'
 require 'models/company'
 require 'models/developer'
+require 'models/computer'
 require 'models/subscriber'
 require 'models/book'
 require 'models/subscription'
diff --git a/activerecord/test/cases/associations/has_one_associations_test.rb b/activerecord/test/cases/associations/has_one_associations_test.rb
index d412b3168e..2ecfcb521d 100644
--- a/activerecord/test/cases/associations/has_one_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_associations_test.rb
@@ -1,5 +1,6 @@
 require "cases/helper"
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/ship'
diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index 9b0cf4c18f..04ef50e58a 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -1,6 +1,7 @@
 require "cases/helper"
 require 'models/computer'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/company'
 require 'models/categorization'
diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb
index c3e8ceb0da..731d433706 100644
--- a/activerecord/test/cases/attribute_methods_test.rb
+++ b/activerecord/test/cases/attribute_methods_test.rb
@@ -1,6 +1,7 @@
 require "cases/helper"
 require 'models/minimalistic'
 require 'models/developer'
+require 'models/computer'
 require 'models/auto_id'
 require 'models/boolean'
 require 'models/computer'
diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index 734fd5fe18..71c34d816a 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -4,6 +4,7 @@ require 'models/comment'
 require 'models/company'
 require 'models/customer'
 require 'models/developer'
+require 'models/computer'
 require 'models/invoice'
 require 'models/line_item'
 require 'models/order'
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index 3675401555..098d5b8451 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -10,6 +10,7 @@ require 'models/category'
 require 'models/company'
 require 'models/customer'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/default'
 require 'models/auto_id'
diff --git a/activerecord/test/cases/callbacks_test.rb b/activerecord/test/cases/callbacks_test.rb
index c8f56e3c73..5e07f8a03c 100644
--- a/activerecord/test/cases/callbacks_test.rb
+++ b/activerecord/test/cases/callbacks_test.rb
@@ -1,4 +1,6 @@
 require "cases/helper"
+require 'models/developer'
+require 'models/computer'
 
 class CallbackDeveloper < ActiveRecord::Base
   self.table_name = 'developers'
diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index dc73faa5be..33a59d4678 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -10,6 +10,7 @@ require 'models/reply'
 require 'models/entrant'
 require 'models/project'
 require 'models/developer'
+require 'models/computer'
 require 'models/customer'
 require 'models/toy'
 require 'models/matey'
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 7141d3ee7f..4b0ebe13d1 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -10,6 +10,7 @@ require 'models/company'
 require 'models/computer'
 require 'models/course'
 require 'models/developer'
+require 'models/computer'
 require 'models/joke'
 require 'models/matey'
 require 'models/parrot'
diff --git a/activerecord/test/cases/integration_test.rb b/activerecord/test/cases/integration_test.rb
index dfb8a608cb..0021988083 100644
--- a/activerecord/test/cases/integration_test.rb
+++ b/activerecord/test/cases/integration_test.rb
@@ -3,6 +3,7 @@
 require 'cases/helper'
 require 'models/company'
 require 'models/developer'
+require 'models/computer'
 require 'models/owner'
 require 'models/pet'
 
diff --git a/activerecord/test/cases/migration_test.rb b/activerecord/test/cases/migration_test.rb
index 6b7a0a9000..3192b797b4 100644
--- a/activerecord/test/cases/migration_test.rb
+++ b/activerecord/test/cases/migration_test.rb
@@ -5,6 +5,7 @@ require 'bigdecimal/util'
 require 'models/person'
 require 'models/topic'
 require 'models/developer'
+require 'models/computer'
 
 require MIGRATIONS_ROOT + "/valid/2_we_need_reminders"
 require MIGRATIONS_ROOT + "/rename/1_we_need_things"
diff --git a/activerecord/test/cases/modules_test.rb b/activerecord/test/cases/modules_test.rb
index e87773df94..6f65bf80eb 100644
--- a/activerecord/test/cases/modules_test.rb
+++ b/activerecord/test/cases/modules_test.rb
@@ -2,6 +2,7 @@ require "cases/helper"
 require 'models/company_in_module'
 require 'models/shop'
 require 'models/developer'
+require 'models/computer'
 
 class ModulesTest < ActiveRecord::TestCase
   fixtures :accounts, :companies, :projects, :developers, :collections, :products, :variants
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 2170fe6118..2bcd496415 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -8,6 +8,7 @@ require 'models/reply'
 require 'models/category'
 require 'models/company'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/minimalistic'
 require 'models/warehouse_thing'
diff --git a/activerecord/test/cases/readonly_test.rb b/activerecord/test/cases/readonly_test.rb
index 5b903e4f2c..1c919f0b57 100644
--- a/activerecord/test/cases/readonly_test.rb
+++ b/activerecord/test/cases/readonly_test.rb
@@ -3,6 +3,7 @@ require 'models/author'
 require 'models/post'
 require 'models/comment'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/reader'
 require 'models/person'
diff --git a/activerecord/test/cases/relation/merging_test.rb b/activerecord/test/cases/relation/merging_test.rb
index 8f40a1890d..eb76ef6328 100644
--- a/activerecord/test/cases/relation/merging_test.rb
+++ b/activerecord/test/cases/relation/merging_test.rb
@@ -2,6 +2,7 @@ require 'cases/helper'
 require 'models/author'
 require 'models/comment'
 require 'models/developer'
+require 'models/computer'
 require 'models/post'
 require 'models/project'
 require 'models/rating'
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index 410b5ba5a3..8ac4a4ca36 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -7,6 +7,7 @@ require 'models/comment'
 require 'models/author'
 require 'models/entrant'
 require 'models/developer'
+require 'models/computer'
 require 'models/reply'
 require 'models/company'
 require 'models/bird'
diff --git a/activerecord/test/cases/scoping/default_scoping_test.rb b/activerecord/test/cases/scoping/default_scoping_test.rb
index a5c4404175..880d0e8293 100644
--- a/activerecord/test/cases/scoping/default_scoping_test.rb
+++ b/activerecord/test/cases/scoping/default_scoping_test.rb
@@ -2,6 +2,7 @@ require 'cases/helper'
 require 'models/post'
 require 'models/comment'
 require 'models/developer'
+require 'models/computer'
 
 class DefaultScopingTest < ActiveRecord::TestCase
   fixtures :developers, :posts, :comments
diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb
index c2816c3670..41f3449828 100644
--- a/activerecord/test/cases/scoping/named_scoping_test.rb
+++ b/activerecord/test/cases/scoping/named_scoping_test.rb
@@ -5,6 +5,7 @@ require 'models/comment'
 require 'models/reply'
 require 'models/author'
 require 'models/developer'
+require 'models/computer'
 
 class NamedScopingTest < ActiveRecord::TestCase
   fixtures :posts, :authors, :topics, :comments, :author_addresses
diff --git a/activerecord/test/cases/scoping/relation_scoping_test.rb b/activerecord/test/cases/scoping/relation_scoping_test.rb
index 73835c85a8..d7bcbf6203 100644
--- a/activerecord/test/cases/scoping/relation_scoping_test.rb
+++ b/activerecord/test/cases/scoping/relation_scoping_test.rb
@@ -2,6 +2,7 @@ require "cases/helper"
 require 'models/post'
 require 'models/author'
 require 'models/developer'
+require 'models/computer'
 require 'models/project'
 require 'models/comment'
 require 'models/category'
diff --git a/activerecord/test/cases/timestamp_test.rb b/activerecord/test/cases/timestamp_test.rb
index abf6becc17..db474c63a4 100644
--- a/activerecord/test/cases/timestamp_test.rb
+++ b/activerecord/test/cases/timestamp_test.rb
@@ -1,6 +1,7 @@
 require 'cases/helper'
 require 'support/ddl_helper'
 require 'models/developer'
+require 'models/computer'
 require 'models/owner'
 require 'models/pet'
 require 'models/toy'
diff --git a/activerecord/test/cases/transactions_test.rb b/activerecord/test/cases/transactions_test.rb
index 5cccf2dda5..7160e8324d 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -2,6 +2,7 @@ require "cases/helper"
 require 'models/topic'
 require 'models/reply'
 require 'models/developer'
+require 'models/computer'
 require 'models/book'
 require 'models/author'
 require 'models/post'
diff --git a/activerecord/test/cases/validations_test.rb b/activerecord/test/cases/validations_test.rb
index 55804f9576..db8159eff8 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -4,6 +4,7 @@ require 'models/topic'
 require 'models/reply'
 require 'models/person'
 require 'models/developer'
+require 'models/computer'
 require 'models/parrot'
 require 'models/company'