diff --git a/activerecord/test/cases/adapters/mysql2/explain_test.rb b/activerecord/test/cases/adapters/mysql2/explain_test.rb
index 675703caa1058c039803051ada4e80c072a21d1a..f67f21fab1af4c07d79a0e920d51c3eb65cfccd8 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 19053b67324f13a5003195203a912eddedbe5e47..d2dd04b84b0eabc0861079d1188cba6309ca1f03 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 f1d6119d2e198ac1027597e164342de61e7c4ba5..de6e35ef57a48ad237b31d7e7da3388b4b8d2b14 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 bcd0cf82d508812e78ff134c88b9dd2cacc61e06..17394cb6f7b6ae779d1bc40273567295e8f204c1 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 5b7e462f64bd758a22e4d6f171de1288b7bf4e0d..a531e0e02c4f10ae949c5606287cc322f5bb73d0 100644
--- a/activerecord/test/cases/associations/callbacks_test.rb
+++ b/activerecord/test/cases/associations/callbacks_test.rb
@@ -3,6 +3,7 @@
 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 8234ee95be1d5e0cf6c7f98fc084897c0527997e..4539b99504d9eb3df5c6e0bbe44814af9e4c255d 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -17,6 +17,7 @@
 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 4c1fdfdd9a70f31dae9a6e4191591da073a0ac4e..9d373cd73b2b3f6a7bc35c7d6f03ce2ac5772cf6 100644
--- a/activerecord/test/cases/associations/extension_test.rb
+++ b/activerecord/test/cases/associations/extension_test.rb
@@ -3,6 +3,7 @@
 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 69f7bde4bca18ebd4e6c62de386238c9b2f7ff57..5a963b64589cb5348a7c1cd9563cd650866d47e9 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 cddf1a1f7277f9d6027a26c0e643b27664a5042c..df4a30ae9b9caef2c21df1c798c785921cd7e2b3 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/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 d412b3168ed3d5ed2aa99878520f6c9fafcf1bfd..2ecfcb521d212064fe04f3d96ba0e522415cd5b2 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 9b0cf4c18f7178a23dbbb7ecb1df2aaa8b452970..04ef50e58a79212dcb1c83655139d83702f68c35 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 c3e8ceb0da19e78bf9744cd08c260416447fdb43..731d433706db0994c284e34682a59f3aec483426 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 734fd5fe18e0ada5ed71a07644fe6d1aaa1dc088..71c34d816ae88603fcccab6bdee291f372193a4b 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -4,6 +4,7 @@
 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 36754015554040ad269329f0ff6c816def529425..098d5b8451b2983db1f12a620a0e889e0d175c15 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -10,6 +10,7 @@
 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 c8f56e3c73076cf8f48f703999677763734c0be2..5e07f8a03c7e5100a3671cf39a57f19f6090151d 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 dc73faa5be6b635a7430bc10e8933b2f3bc10860..33a59d467805bc7b38a5ef64791e267871f0c7dc 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -10,6 +10,7 @@
 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 7141d3ee7f6f7666177a3fddf4b94f458eb5b9aa..4b0ebe13d1e91ea7d58ea4eea90418e0fc64bbb1 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -10,6 +10,7 @@
 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 dfb8a608cb4cd98561f9e4b11a7bdb6e66577be3..0021988083b4c3c0b2fb4622aa14c50133d0de0a 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 6b7a0a90009f3a3aa7dc9d4557b32203557d7026..3192b797b4755f6519178bf00de2a2f2699c70e8 100644
--- a/activerecord/test/cases/migration_test.rb
+++ b/activerecord/test/cases/migration_test.rb
@@ -5,6 +5,7 @@
 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 e87773df94d218af379a0626ec76346f5e92143a..6f65bf80eb441dbdc75e4c8671260b3c07efd988 100644
--- a/activerecord/test/cases/modules_test.rb
+++ b/activerecord/test/cases/modules_test.rb
@@ -2,6 +2,7 @@
 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 2170fe6118288f04ee365155fad226507972d542..2bcd4964156797be93a6d299f8b6d903b0ea32cb 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -8,6 +8,7 @@
 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 5b903e4f2cd599f7ae20dbf546b7be78f3671b99..1c919f0b57763e728d3c315f3a81f9542b93c209 100644
--- a/activerecord/test/cases/readonly_test.rb
+++ b/activerecord/test/cases/readonly_test.rb
@@ -3,6 +3,7 @@
 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 8f40a1890dcc67161dee8b2d854ab913b16e01c6..eb76ef6328d9ac0ce945dfe2f9713b3029a8345e 100644
--- a/activerecord/test/cases/relation/merging_test.rb
+++ b/activerecord/test/cases/relation/merging_test.rb
@@ -2,6 +2,7 @@
 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 410b5ba5a3fb41f8aa9e9653bae7bd774c066a2b..8ac4a4ca36480a33675f1b4d7fe7134932bfd737 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -7,6 +7,7 @@
 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 a5c440417519adc02d65f576a175349d6cc5d774..880d0e8293e2147bf3b05939143aae8e98bbd0b2 100644
--- a/activerecord/test/cases/scoping/default_scoping_test.rb
+++ b/activerecord/test/cases/scoping/default_scoping_test.rb
@@ -2,6 +2,7 @@
 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 c2816c36706cf63199707ccb3748343acae3ce5a..41f344982810d0eb08ad3139322c3b06ab736fa0 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/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 73835c85a88677d0e463c41195f40fb628035d9f..d7bcbf62032dd86261dad8775b31e4b245438a8f 100644
--- a/activerecord/test/cases/scoping/relation_scoping_test.rb
+++ b/activerecord/test/cases/scoping/relation_scoping_test.rb
@@ -2,6 +2,7 @@
 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 abf6becc177336ef9dd21bb556529e5ecf689c03..db474c63a4f703e047af6cbb6a1a42aeab65669a 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 5cccf2dda5495341b32a7d3598389f118d073f55..7160e8324d03b17a5ccf451d9811554351221c14 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -2,6 +2,7 @@
 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 55804f95766f2a815b466e99e1a7ff233c7196e8..db8159eff8eb034f8daafc01ac27f24b6f10e669 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -4,6 +4,7 @@
 require 'models/reply'
 require 'models/person'
 require 'models/developer'
+require 'models/computer'
 require 'models/parrot'
 require 'models/company'