diff --git a/Gemfile b/Gemfile
index 11023bb..b127663 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,10 +13,13 @@ ruby ENV["CUSTOM_RUBY_VERSION"] || File.read(
 RAILS_VERSION = Gem::Version.new(
   ENV["RAILS_VERSION"] || File.read(File.expand_path(".rails-version", __dir__)).strip,
 )
+
+gem "puma"
 gem "rails", "~> #{RAILS_VERSION}"
 gem "rake"
 gem "sqlite3", RAILS_VERSION >= Gem::Version.new("8") ? ">= 2" : "~> 1.4"
-gem "puma"
+
+gem "faker"
 gem "rack-cors"
 
 # Only Rails >=7 gems.
diff --git a/Gemfile.lock b/Gemfile.lock
index c6025fb..04fa7db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -113,6 +113,8 @@ GEM
     erubi (1.13.0)
     et-orbi (1.2.11)
       tzinfo
+    faker (3.5.1)
+      i18n (>= 1.8.11, < 2)
     foreman (0.88.1)
     fugit (1.11.1)
       et-orbi (~> 1, >= 1.2.11)
@@ -335,6 +337,7 @@ DEPENDENCIES
   binding_of_caller
   byebug
   cloudflare-rails
+  faker
   foreman
   httparty
   kamal
diff --git a/test/app/controllers/api/test/users_without_rescue_unknown_format_controller.rb b/test/app/controllers/api/test/no_rescue_unknown_format_controller.rb
similarity index 63%
rename from test/app/controllers/api/test/users_without_rescue_unknown_format_controller.rb
rename to test/app/controllers/api/test/no_rescue_unknown_format_controller.rb
index a0fdb80..8c49b32 100644
--- a/test/app/controllers/api/test/users_without_rescue_unknown_format_controller.rb
+++ b/test/app/controllers/api/test/no_rescue_unknown_format_controller.rb
@@ -1,4 +1,4 @@
-class Api::Test::UsersWithoutRescueUnknownFormatController < Api::TestController
+class Api::Test::NoRescueUnknownFormatController < Api::TestController
   include RESTFramework::ModelControllerMixin
 
   self.fields = %w(id login)
diff --git a/test/config/routes.rb b/test/config/routes.rb
index befce6c..ec9cad9 100644
--- a/test/config/routes.rb
+++ b/test/config/routes.rb
@@ -43,14 +43,15 @@
     rest_root :test
     namespace :test do
       rest_resources :users
+
       rest_resources :added_select
       rest_resources :bare_create, force_plural: true, only: [:create]
       rest_resources :fields_hash_exclude
       rest_resources :fields_hash_only_except
+      rest_resources :no_rescue_unknown_format
+      rest_resources :read_only
       rest_resources :users_with_string_serializer
       rest_resources :users_with_sub_fields
-      rest_resources :users_without_rescue_unknown_format
-      rest_resources :read_only
 
       rest_route :network
 
diff --git a/test/db/migrate/20240906180000_test_app_tables.rb b/test/db/migrate/20240906180000_test_app_tables.rb
index 79805cd..d55a9d0 100644
--- a/test/db/migrate/20240906180000_test_app_tables.rb
+++ b/test/db/migrate/20240906180000_test_app_tables.rb
@@ -2,12 +2,20 @@ class TestAppTables < ActiveRecord::Migration[6.0]
   def change
     create_table(:users) do |t|
       t.string(:login, null: false, default: "", index: {unique: true})
-      t.boolean(:is_admin, default: false)
+      t.string(:legal_name, null: false, default: "")
+      t.string(:short_name, null: false, default: "")
       t.integer(:age)
+
+      t.boolean(:is_admin, null: false, default: false)
+
       t.decimal(:balance, precision: 8, scale: 2)
+
       t.integer(:state, null: false, default: 0)
       t.string(:status, null: false, default: "")
 
+      t.time(:day_start)
+      t.date(:last_reviewed_on)
+
       t.references(:manager, foreign_key: {on_delete: :nullify, to_table: :users})
 
       t.timestamps(null: true)
diff --git a/test/db/schema.rb b/test/db/schema.rb
index cc1a476..df2e600 100644
--- a/test/db/schema.rb
+++ b/test/db/schema.rb
@@ -103,11 +103,15 @@
 
   create_table "users", force: :cascade do |t|
     t.string "login", default: "", null: false
-    t.boolean "is_admin", default: false
+    t.string "legal_name", default: "", null: false
+    t.string "short_name", default: "", null: false
     t.integer "age"
+    t.boolean "is_admin", default: false, null: false
     t.decimal "balance", precision: 8, scale: 2
     t.integer "state", default: 0, null: false
     t.string "status", default: "", null: false
+    t.time "day_start"
+    t.date "last_reviewed_on"
     t.integer "manager_id"
     t.datetime "created_at"
     t.datetime "updated_at"
diff --git a/test/db/seeds.rb b/test/db/seeds.rb
index bfcb5ba..2a55023 100644
--- a/test/db/seeds.rb
+++ b/test/db/seeds.rb
@@ -1,4 +1,6 @@
-# Seed data is used for controller tests which need data to be useful, and also for the Demo API.
+# Seed data is used for the Demo API.
+
+Faker::Config.random = Random.new(42)
 
 example = User.create!(
   login: "example",
@@ -15,20 +17,62 @@
 )
 example.update!(manager: admin)
 
-action = Genre.create!(name: "Action", description: "Action movies are fast-paced and exciting.")
-_comedy = Genre.create!(name: "Comedy", description: "Comedy movies are funny.")
-_drama = Genre.create!(name: "Drama", description: "Drama movies are serious.")
-fantasy = Genre.create!(name: "Fantasy", description: "Fantasy movies are magical.")
-adventure = Genre.create!(name: "Adventure", description: "Adventure movies are exciting.")
+1000.times do |_|
+  # Create with faker data:
+  legal_name = Faker::Name.name_with_middle
+  short_name = legal_name.split(" ").first
+  begin
+    User.create!(
+      login: Faker::Internet.username,
+      legal_name: legal_name,
+      short_name: short_name,
+      age: rand(18..65),
+      is_admin: rand < 0.2,
+      balance: rand(0.0..10000.0),
+      state: [0, 0, 0, 0, User.states.keys.sample].sample,
+      status: User::STATUS_OPTS.keys.sample,
+      day_start: ["7:30", "8:00", "8:30", "9:00", "9:30"].sample,
+      last_reviewed_on: Time.zone.today - rand(0..365).days,
+      manager: [nil, example, admin, User.first(10).sample].sample,
+    )
+  rescue ActiveRecord::RecordInvalid
+  end
+end
 
-star_wars = Movie.create!(name: "Star Wars IV: A New Hope", price: 14.99, main_genre: action)
-dark_knight = Movie.create!(name: "The Dark Knight", price: 13.99, main_genre: action)
-fellowship = Movie.create!(
-  name: "The Lord of the Rings: The Fellowship of the Ring", price: 12.99, main_genre: adventure,
-)
-matrix = Movie.create!(name: "The Matrix", price: 14.50, main_genre: action)
-_avengers = Movie.create!(name: "The Avengers", price: 7.00, main_genre: action)
-_inception = Movie.create!(name: "Inception", price: 15.99, main_genre: fantasy)
+# Created by copilot:
+Genre.create!(name: "Action", description: "Action movies are fast-paced and exciting.")
+Genre.create!(name: "Comedy", description: "Comedy movies are funny.")
+Genre.create!(name: "Drama", description: "Drama movies are serious.")
+Genre.create!(name: "Fantasy", description: "Fantasy movies are magical.")
+Genre.create!(name: "Adventure", description: "Adventure movies are exciting.")
+Genre.create!(name: "Sci-Fi", description: "Sci-Fi movies are futuristic.")
+Genre.create!(name: "Horror", description: "Horror movies are scary.")
+Genre.create!(name: "Thriller", description: "Thriller movies are suspenseful.")
+Genre.create!(name: "Mystery", description: "Mystery movies are puzzling.")
+Genre.create!(name: "Romance", description: "Romance movies are about love.")
+Genre.create!(name: "Musical", description: "Musical movies have singing and dancing.")
+Genre.create!(name: "Documentary", description: "Documentary movies are non-fiction.")
+Genre.create!(name: "Animation", description: "Animation movies are animated.")
+Genre.create!(name: "Family", description: "Family movies are for all ages.")
+Genre.create!(name: "Western", description: "Western movies are about the American West.")
+Genre.create!(name: "War", description: "War movies are about military conflict.")
+Genre.create!(name: "History", description: "History movies are about the past.")
+Genre.create!(name: "Biography", description: "Biography movies are about real people.")
+Genre.create!(name: "Sport", description: "Sport movies are about athletics.")
+Genre.create!(name: "Music", description: "Music movies are about musicians.")
+Genre.create!(name: "Crime", description: "Crime movies are about criminals.")
+Genre.create!(name: "Noir", description: "Noir movies are dark and cynical.")
+Genre.create!(name: "Superhero", description: "Superhero movies are about heroes.")
+Genre.create!(name: "Spy", description: "Spy movies are about espionage.")
+
+50.times do |_|
+  Movie.create!(
+    name: Faker::Movie.title,
+    price: rand(5.0..20.0),
+    main_genre: Genre.all.sample,
+  )
+rescue ActiveRecord::RecordInvalid
+end
 
-example.movies += [star_wars, dark_knight]
-admin.movies += [star_wars, fellowship, matrix]
+example.movies += Movie.all.sample(5)
+admin.movies += Movie.all.sample(20)
diff --git a/test/test/controllers/api/demo/base.rb b/test/test/controllers/api/demo/base.rb
index e693717..05d293c 100644
--- a/test/test/controllers/api/demo/base.rb
+++ b/test/test/controllers/api/demo/base.rb
@@ -6,7 +6,6 @@ module Api::Demo::Base
   def self.included(base)
     base.class_attribute(:create_params)
     base.class_attribute(:update_params)
-    base.setup { Rails.application.load_seed }
   end
 
   def test_index_with_filtering
diff --git a/test/test/controllers/api/demo/movies_controller_test.rb b/test/test/controllers/api/demo/movies_controller_test.rb
index e0962ed..9560343 100644
--- a/test/test/controllers/api/demo/movies_controller_test.rb
+++ b/test/test/controllers/api/demo/movies_controller_test.rb
@@ -8,9 +8,9 @@ class Api::Demo::MoviesControllerTest < ActionController::TestCase
 
   if defined?(Ransack)
     def test_ransack_simple
-      get(:index, as: :json, params: {q: {price_gt: 15}})
+      get(:index, as: :json, params: {q: {price_gt: 9}})
       assert_response(:success)
-      assert_equal(1, @response.parsed_body["results"].length)
+      assert_equal(2, @response.parsed_body["results"].length)
     end
   end
 
diff --git a/test/test/controllers/api/plain/base.rb b/test/test/controllers/api/plain/base.rb
index fd1912c..7fd00b4 100644
--- a/test/test/controllers/api/plain/base.rb
+++ b/test/test/controllers/api/plain/base.rb
@@ -6,7 +6,6 @@ module Api::Plain::Base
   def self.included(base)
     base.class_attribute(:create_params)
     base.class_attribute(:update_params)
-    base.setup { Rails.application.load_seed }
   end
 
   def test_index_with_filtering
diff --git a/test/test/controllers/api/test/added_select_controller_test.rb b/test/test/controllers/api/test/added_select_controller_test.rb
index e817eac..fae1eaf 100644
--- a/test/test/controllers/api/test/added_select_controller_test.rb
+++ b/test/test/controllers/api/test/added_select_controller_test.rb
@@ -1,8 +1,6 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::AddedSelectControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
-
   def test_only_works
     get(:index, as: :json, params: {only: "id,selected_value"})
     assert_response(:success)
diff --git a/test/test/controllers/api/test/bare_create_controller_test.rb b/test/test/controllers/api/test/bare_create_controller_test.rb
index 70ebfda..00f4f36 100644
--- a/test/test/controllers/api/test/bare_create_controller_test.rb
+++ b/test/test/controllers/api/test/bare_create_controller_test.rb
@@ -1,8 +1,6 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::BareCreateControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
-
   def test_bare_create
     post(:create, as: :json, params: {name: "Test Bare Create"})
     assert_response(:success)
diff --git a/test/test/controllers/api/test/base.rb b/test/test/controllers/api/test/base.rb
deleted file mode 100644
index b26afb0..0000000
--- a/test/test/controllers/api/test/base.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-require "test_helper"
-
-module BaseApi
-  module TestControllerTests
-    def self.included(base)
-      base.setup { Rails.application.load_seed }
-    end
-  end
-end
diff --git a/test/test/controllers/api/test/fields_hash_only_except_controller_test.rb b/test/test/controllers/api/test/fields_hash_only_except_controller_test.rb
index f3bdd5d..e66dd86 100644
--- a/test/test/controllers/api/test/fields_hash_only_except_controller_test.rb
+++ b/test/test/controllers/api/test/fields_hash_only_except_controller_test.rb
@@ -1,8 +1,6 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::FieldsHashOnlyExceptControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
-
   def test_list
     get(:index, as: :json)
     assert_response(:success)
diff --git a/test/test/controllers/api/test/network_controller_test.rb b/test/test/controllers/api/test/network_controller_test.rb
index e531d5c..7a7458b 100644
--- a/test/test/controllers/api/test/network_controller_test.rb
+++ b/test/test/controllers/api/test/network_controller_test.rb
@@ -1,8 +1,6 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::NetworkControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
-
   def test_cannot_list
     assert_raises(ActionController::UrlGenerationError) do
       get(:index)
diff --git a/test/test/controllers/api/test/read_only_controller_test.rb b/test/test/controllers/api/test/read_only_controller_test.rb
index a827b80..fe5386b 100644
--- a/test/test/controllers/api/test/read_only_controller_test.rb
+++ b/test/test/controllers/api/test/read_only_controller_test.rb
@@ -1,8 +1,6 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::ReadOnlyControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
-
   def test_list
     get(:index, as: :json)
     assert_response(:success)
diff --git a/test/test/controllers/api/test/users_with_string_serializer_controller_test.rb b/test/test/controllers/api/test/users_with_string_serializer_controller_test.rb
index 420a37e..420cb32 100644
--- a/test/test/controllers/api/test/users_with_string_serializer_controller_test.rb
+++ b/test/test/controllers/api/test/users_with_string_serializer_controller_test.rb
@@ -1,5 +1,4 @@
-require_relative "base"
+require "test_helper"
 
 class Api::Test::UsersWithStringSerializerControllerTest < ActionController::TestCase
-  include BaseApi::TestControllerTests
 end
diff --git a/test/test/controllers/render_json_controller_test.rb b/test/test/controllers/render_json_controller_test.rb
index a421ecc..1aa15ae 100644
--- a/test/test/controllers/render_json_controller_test.rb
+++ b/test/test/controllers/render_json_controller_test.rb
@@ -2,8 +2,6 @@
 
 if defined?(ActiveModel::Serializer)
   class RenderJsonControllerTest < ActionController::TestCase
-    setup { Rails.application.load_seed }
-
     def test_list_rest_serializer
       get(:list_rest_serializer)
       assert_response(:success)
diff --git a/test/test/fixtures/genres.yml b/test/test/fixtures/genres.yml
new file mode 100644
index 0000000..5237092
--- /dev/null
+++ b/test/test/fixtures/genres.yml
@@ -0,0 +1,15 @@
+action:
+  name: Action
+  description: Action movies are fast-paced and exciting.
+comedy:
+  name: Comedy
+  description: Comedy movies are funny.
+drama:
+  name: Drama
+  description: Drama movies are serious.
+fantasy:
+  name: Fantasy
+  description: Fantasy movies are magical.
+adventure:
+  name: Adventure
+  description: Adventure movies are exciting.
diff --git a/test/test/fixtures/movies.yml b/test/test/fixtures/movies.yml
new file mode 100644
index 0000000..67af4f8
--- /dev/null
+++ b/test/test/fixtures/movies.yml
@@ -0,0 +1,16 @@
+dark_knight:
+  name: The Dark Knight
+  price: 10.0
+  main_genre: action
+inception:
+  name: Inception
+  price: 12.0
+  main_genre: action
+the_hangover:
+  name: The Hangover
+  price: 8.0
+  main_genre: comedy
+the_shawshank_redemption:
+  name: The Shawshank Redemption
+  price: 9.0
+  main_genre: drama
diff --git a/test/test/fixtures/users.yml b/test/test/fixtures/users.yml
new file mode 100644
index 0000000..dbc3c53
--- /dev/null
+++ b/test/test/fixtures/users.yml
@@ -0,0 +1,19 @@
+example:
+  login: example
+  age: 23
+  balance: 20.34
+  state: 0
+  status: online
+  manager: admin
+  movies:
+    - dark_knight
+    - inception
+admin:
+  login: admin
+  is_admin: true
+  age: 34
+  balance: 230.34
+  state: 0
+  status: offline
+  movies:
+    - the_shawshank_redemption
diff --git a/test/test/integration/api/demo_routing_test.rb b/test/test/integration/api/demo_routing_test.rb
index 7077a33..845252f 100644
--- a/test/test/integration/api/demo_routing_test.rb
+++ b/test/test/integration/api/demo_routing_test.rb
@@ -16,13 +16,10 @@ def test_can_get_users
     assert_response(:success)
   end
 
-  # TODO: Disabled because test is broken in Rails 8, but behavior tested manually and working.
-  def _test_can_not_get_network_resourceful_routes
-    assert_raises(ActionController::RoutingError) do
-      get("/api/demo/network.json")
-    end
-    assert_raises(ActionController::RoutingError) do
-      get("/api/demo/network")
-    end
+  def test_can_not_get_network_resourceful_routes
+    get("/api/demo/network.json")
+    assert_response(:not_found)
+    get("/api/demo/network")
+    assert_response(:not_found)
   end
 end
diff --git a/test/test/integration/api/test_routing_test.rb b/test/test/integration/api/test_routing_test.rb
index 45a24ed..ca2df81 100644
--- a/test/test/integration/api/test_routing_test.rb
+++ b/test/test/integration/api/test_routing_test.rb
@@ -2,8 +2,6 @@
 
 # The goal of this test is to ensure that the proper routes are defined for API2.
 class Api::TestRoutingTest < ActionDispatch::IntegrationTest
-  setup { Rails.application.load_seed }
-
   def test_can_get_root
     get("/api/test")
     assert_response(:success)
diff --git a/test/test/integration/rescuing_unknown_formats_test.rb b/test/test/integration/rescuing_unknown_formats_test.rb
index acfdb4f..9622fcd 100644
--- a/test/test/integration/rescuing_unknown_formats_test.rb
+++ b/test/test/integration/rescuing_unknown_formats_test.rb
@@ -2,14 +2,10 @@
 
 # The goal of this test is to ensure unknown formats are rescued, when configured.
 class RescuingUnknownFormatsTest < ActionDispatch::IntegrationTest
-  setup { Rails.application.load_seed }
-
   # Test that an invalid format raises an uncaught exception.
-  # TODO: Disabled because test is broken in Rails 8, but behavior tested manually and working.
-  def _test_raise_unknown_format
-    assert_raises(ActionController::UnknownFormat) do
-      get("/api/test/users_without_rescue_unknown_format.jsom")
-    end
+  def test_raise_unknown_format
+    get("/api/test/no_rescue_unknown_format.jsom")
+    assert_response(:not_acceptable)
   end
 
   # Test that we rescue an unknown format and also that it defaults to :json.
diff --git a/test/test/models/base.rb b/test/test/models/base.rb
index 362ea58..f5b4eba 100644
--- a/test/test/models/base.rb
+++ b/test/test/models/base.rb
@@ -8,8 +8,6 @@ def self.included(base)
     base.setup do
       @model ||= self.class.name.match(/(.*)Test$/)[1].constantize
       @title_field ||= TITLE_FIELDS.select { |f| f.to_s.in?(@model.column_names) }[0]
-
-      Rails.application.load_seed
     end
   end
 
diff --git a/test/test/test_helper.rb b/test/test/test_helper.rb
index ed0ef51..6ea552d 100644
--- a/test/test/test_helper.rb
+++ b/test/test/test_helper.rb
@@ -23,3 +23,7 @@
 # end
 
 require "rails/test_help"
+
+class ActiveSupport::TestCase
+  fixtures :all
+end