diff --git a/lib/tasks/dev.rake b/lib/tasks/dev.rake
deleted file mode 100644
index e4c120a8d..000000000
--- a/lib/tasks/dev.rake
+++ /dev/null
@@ -1,183 +0,0 @@
-namespace :dev do
-  desc 'Generates dummy data in development environment' \
-             ' (options: [random] for random data generation - slowest)'
-
-  task :prime, [:random] => :environment do |t, args|
-    abort 'Production environment is not supported' if Rails.env.production?
-
-    include FactoryBot::Syntax::Methods
-
-    PaperTrail.enabled = false
-    Domain.paper_trail_on!
-    Contact.paper_trail_on!
-
-    with_random_data = args[:random].present?
-
-    def create_domain(name:, registrar:, registrant:, account:, price:, reg_time:)
-      duration = price.duration.sub('mons', 'months').split("\s")
-      period = duration.first.to_i
-      period_unit = duration.second[0]
-
-      create(:domain,
-             name: name,
-             period: period,
-             period_unit: period_unit,
-             registered_at: reg_time,
-             expire_time: reg_time + period.send(duration.second.to_sym),
-             created_at: reg_time,
-             updated_at: reg_time,
-             registrar: registrar,
-             registrant: registrant)
-
-      create(:account_activity,
-             account: account,
-             sum: -price.price.amount,
-             activity_type: AccountActivity::CREATE,
-             created_at: reg_time,
-             updated_at: reg_time,
-             price: price)
-    end
-
-    def generate_default_data
-      create(:admin_user, username: 'test', password: 'testtest', password_confirmation: 'testtest')
-
-      zone = create(:zone, origin: 'test')
-      registrar = create(:registrar, name: 'test')
-      registrant = create(:registrant, name: 'test', registrar: registrar)
-
-      account = create(:account, registrar: registrar, balance: 1_000_000)
-      api_user = create(:api_user, username: 'test', password: 'testtest', registrar: registrar)
-
-      epp_session = EppSession.new
-      epp_session.session_id = 'test'
-      epp_session.user = api_user
-      epp_session.save!
-
-      domain_counter = 1.step
-
-      Billing::Price.durations.each do |duration|
-        Billing::Price.operation_categories.each do |operation_category|
-          price = create(:price,
-                         price: Money.from_amount(duration.to_i * 10),
-                         valid_from: Time.zone.now - rand(1).months,
-                         valid_to: Time.zone.now + rand(1).months,
-                         duration: duration,
-                         operation_category: operation_category,
-                         zone: zone)
-
-          next if operation_category == 'renew'
-
-          (rand(3) + 1).times do
-            create_domain(name: "test#{domain_counter.next}.test",
-                          registrar: registrar,
-                          registrant: registrant,
-                          account: account,
-                          price: price,
-                          reg_time: 1.month.ago)
-          end
-
-          (rand(3) + 1).times do
-            create_domain(name: "test#{domain_counter.next}.test",
-                          registrar: registrar,
-                          registrant: registrant,
-                          account: account,
-                          price: price,
-                          reg_time: Time.zone.now)
-          end
-        end
-      end
-
-      create_domain(name: 'test.test',
-                    registrar: registrar,
-                    registrant: registrant,
-                    account: account,
-                    price: Billing::Price.first,
-                    reg_time: Time.zone.now)
-    end
-
-    def generate_random_data
-      zone_count = 10
-      admin_user_count = 5
-      registrar_count = 50
-      api_user_count = 10
-      registrant_count = 50
-      domain_count = 50
-      registrars = []
-      registrants = []
-      zones = []
-      registrant_names = [
-          'John Doe',
-          'John Roe',
-          'Jane Doe',
-          'Jane Roe',
-          'John Smith',
-      ]
-
-      zone_count.times do
-        origin = SecureRandom.hex[0..(rand(5) + 1)]
-        zones << create(:zone, origin: origin)
-      end
-
-      zone_origins = zones.collect { |zone| zone.origin }
-
-      admin_user_count.times do
-        uid = SecureRandom.hex[0..(rand(5) + 1)]
-        create(:admin_user, username: "test#{uid}", password: 'testtest', password_confirmation: 'testtest')
-      end
-
-      registrar_count.times do
-        uid = SecureRandom.hex[0..(rand(5) + 1)]
-        registrars << create(:registrar, name: "Acme Ltd. #{uid}")
-      end
-
-      registrars.each do |registrar|
-        create(:account, registrar: registrar, balance: rand(99999))
-
-        api_user_count.times do |i|
-          create(:api_user, username: "test#{registrar.id}#{i}", password: 'testtest', registrar: registrar)
-        end
-
-        registrant_count.times do |i|
-          registrants << create(:registrant, name: registrant_names.sample, registrar: registrar)
-        end
-
-        domain_count.times do |i|
-          name = "test#{registrar.id}#{i}#{rand(99999)}.#{zone_origins.sample}"
-          period = rand(3) + 1
-
-          create(:domain,
-                 name: name,
-                 period: period,
-                 period_unit: 'y',
-                 registered_at: Time.zone.now,
-                 expire_time: Time.zone.now + period.years,
-                 registrar: registrar,
-                 registrant: registrants.sample)
-        end
-      end
-
-      zones.each do |zone|
-        Billing::Price.durations.each do |duration|
-          Billing::Price.operation_categories.each do |operation_category|
-            create(:price,
-                   price: Money.from_amount(rand(10) + 1),
-                   valid_from: Time.zone.now.beginning_of_day,
-                   valid_to: Time.zone.now + (rand(10) + 1).years,
-                   duration: duration,
-                   operation_category: operation_category,
-                   zone: zone)
-          end
-        end
-      end
-    end
-
-    Setting.api_ip_whitelist_enabled = false
-    Setting.address_processing = false
-    Setting.registrar_ip_whitelist_enabled = false
-
-    ActiveRecord::Base.transaction do
-      generate_default_data
-      generate_random_data if with_random_data
-    end
-  end
-end
diff --git a/test/fixtures/users.yml b/test/fixtures/users.yml
index b20bd8a83..494cadd24 100644
--- a/test/fixtures/users.yml
+++ b/test/fixtures/users.yml
@@ -18,6 +18,7 @@ api_goodnames:
 
 admin:
   username: test
+  encrypted_password: <%= Devise::Encryptor.digest(AdminUser, 'testtest') %>
   type: AdminUser
   country_code: US
   roles: