diff --git a/Gemfile b/Gemfile
index a7e7f2810..8dc7f23af 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 
 gem 'compass-rails', '3.0.2'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.0.7.2'
+gem 'rails', '~> 5.1.7'
 # Use Puma as web server
 gem 'puma', '3.12.4'
 # Use SCSS for stylesheets
@@ -30,6 +30,7 @@ group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   # comment over to use visual debugger (eg. RubyMine), uncomment to use manual debugging
   # gem 'byebug'
+  gem 'dotenv-rails'
 end
 
 group :development do
@@ -54,7 +55,6 @@ end
 
 group :test do
   gem 'database_cleaner'
-  gem 'dotenv-rails'
   gem 'faker'
   gem 'minitest-reporters'
   gem 'pdf-reader'
diff --git a/Gemfile.lock b/Gemfile.lock
index b80d30bf6..58694a2ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,42 +4,42 @@ GEM
     Ascii85 (1.0.3)
     aasm (5.0.8)
       concurrent-ruby (~> 1.0)
-    actioncable (5.0.7.2)
-      actionpack (= 5.0.7.2)
-      nio4r (>= 1.2, < 3.0)
+    actioncable (5.1.7)
+      actionpack (= 5.1.7)
+      nio4r (~> 2.0)
       websocket-driver (~> 0.6.1)
-    actionmailer (5.0.7.2)
-      actionpack (= 5.0.7.2)
-      actionview (= 5.0.7.2)
-      activejob (= 5.0.7.2)
+    actionmailer (5.1.7)
+      actionpack (= 5.1.7)
+      actionview (= 5.1.7)
+      activejob (= 5.1.7)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.0.7.2)
-      actionview (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
+    actionpack (5.1.7)
+      actionview (= 5.1.7)
+      activesupport (= 5.1.7)
       rack (~> 2.0)
-      rack-test (~> 0.6.3)
+      rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
     actionpack-page_caching (1.1.0)
       actionpack (>= 4.0.0, < 6)
-    actionview (5.0.7.2)
-      activesupport (= 5.0.7.2)
+    actionview (5.1.7)
+      activesupport (= 5.1.7)
       builder (~> 3.1)
-      erubis (~> 2.7.0)
+      erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
     active_record_query_trace (1.7)
-    activejob (5.0.7.2)
-      activesupport (= 5.0.7.2)
+    activejob (5.1.7)
+      activesupport (= 5.1.7)
       globalid (>= 0.3.6)
-    activemodel (5.0.7.2)
-      activesupport (= 5.0.7.2)
-    activerecord (5.0.7.2)
-      activemodel (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
-      arel (~> 7.0)
-    activesupport (5.0.7.2)
+    activemodel (5.1.7)
+      activesupport (= 5.1.7)
+    activerecord (5.1.7)
+      activemodel (= 5.1.7)
+      activesupport (= 5.1.7)
+      arel (~> 8.0)
+    activesupport (5.1.7)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -51,7 +51,7 @@ GEM
     api-pagination (4.8.2)
     apipie-rails (0.5.17)
       rails (>= 4.1)
-    arel (7.1.4)
+    arel (8.0.0)
     ast (2.4.0)
     autoprefixer-rails (9.7.4)
       execjs
@@ -147,7 +147,7 @@ GEM
       faraday
       multi_json
     equalizer (0.0.11)
-    erubis (2.7.0)
+    erubi (1.9.0)
     et-orbi (1.2.1)
       tzinfo
     execjs (2.7.0)
@@ -286,20 +286,20 @@ GEM
     rack (2.2.2)
     rack-protection (2.0.8.1)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
     railroady (1.5.3)
-    rails (5.0.7.2)
-      actioncable (= 5.0.7.2)
-      actionmailer (= 5.0.7.2)
-      actionpack (= 5.0.7.2)
-      actionview (= 5.0.7.2)
-      activejob (= 5.0.7.2)
-      activemodel (= 5.0.7.2)
-      activerecord (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
+    rails (5.1.7)
+      actioncable (= 5.1.7)
+      actionmailer (= 5.1.7)
+      actionpack (= 5.1.7)
+      actionview (= 5.1.7)
+      activejob (= 5.1.7)
+      activemodel (= 5.1.7)
+      activerecord (= 5.1.7)
+      activesupport (= 5.1.7)
       bundler (>= 1.3.0)
-      railties (= 5.0.7.2)
+      railties (= 5.1.7)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
@@ -313,9 +313,9 @@ GEM
       rails_stdout_logging
     rails_serve_static_assets (0.0.5)
     rails_stdout_logging (0.0.5)
-    railties (5.0.7.2)
-      actionpack (= 5.0.7.2)
-      activesupport (= 5.0.7.2)
+    railties (5.1.7)
+      actionpack (= 5.1.7)
+      activesupport (= 5.1.7)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
@@ -493,7 +493,7 @@ DEPENDENCIES
   puma (= 3.12.4)
   pundit
   railroady
-  rails (~> 5.0.7.2)
+  rails (~> 5.1.7)
   rails-observers
   rails_12factor
   rb-readline
diff --git a/Procfile b/Procfile
index 66b40ebd4..af88f2ea2 100644
--- a/Procfile
+++ b/Procfile
@@ -1,3 +1,3 @@
-web:    bundle exec rails server puma -p $PORT -b0.0.0.0
+web:    bundle exec rails server puma -p $PORT
 worker: bundle exec sidekiq -C ./config/sidekiq.yml
 mail:   mailcatcher --foreground --http-ip=0.0.0.0
diff --git a/app/services/event_service.rb b/app/services/event_service.rb
index ee2e263a4..d75b612bc 100644
--- a/app/services/event_service.rb
+++ b/app/services/event_service.rb
@@ -11,7 +11,7 @@ class EventService
                                              start_at: range[:start_at],
                                              end_at: range[:end_at],
                                              available_type: 'event' })
-          .except!(:start_date, :end_date, :start_time, :end_time, :all_day)
+          .extract!(:start_date, :end_date, :start_time, :end_time, :all_day)
     # convert main price to centimes
     params[:amount] = (params[:amount].to_f * 100 if params[:amount].present?)
     # delete non-complete "other" prices and convert them to centimes
diff --git a/app/services/members/members_service.rb b/app/services/members/members_service.rb
index 2c15a3caf..a5f63ca8e 100644
--- a/app/services/members/members_service.rb
+++ b/app/services/members/members_service.rb
@@ -2,7 +2,6 @@
 
 # Provides helper methods for User actions
 class Members::MembersService
-
   attr_accessor :member
 
   def initialize(member)
@@ -10,10 +9,9 @@ class Members::MembersService
   end
 
   def update(params)
-
     if params[:group_id] && @member.group_id != params[:group_id].to_i && !@member.subscribed_plan.nil?
       # here a group change is requested but unprocessable, handle the exception
-      @member.errors[:group_id] = I18n.t('members.unable_to_change_the_group_while_a_subscription_is_running')
+      @member.errors.add(:group_id, I18n.t('members.unable_to_change_the_group_while_a_subscription_is_running'))
       return false
     end
 
@@ -80,5 +78,4 @@ class Members::MembersService
       params[:password]
     end
   end
-
 end
diff --git a/bin/setup b/bin/setup
index e620b4dad..78c4e861d 100755
--- a/bin/setup
+++ b/bin/setup
@@ -18,6 +18,10 @@ chdir APP_ROOT do
   system! 'gem install bundler --conservative'
   system('bundle check') || system!('bundle install')
 
+  # Install JavaScript dependencies if using Yarn
+  # system('bin/yarn')
+
+
   # puts "\n== Copying sample files =="
   # unless File.exist?('config/database.yml')
   #   cp 'config/database.yml.sample', 'config/database.yml'
diff --git a/bin/yarn b/bin/yarn
new file mode 100755
index 000000000..c2bacef83
--- /dev/null
+++ b/bin/yarn
@@ -0,0 +1,11 @@
+#!/usr/bin/env ruby
+VENDOR_PATH = File.expand_path('..', __dir__)
+Dir.chdir(VENDOR_PATH) do
+  begin
+    exec "yarnpkg #{ARGV.join(" ")}"
+  rescue Errno::ENOENT
+    $stderr.puts "Yarn executable was not detected in the system."
+    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
+    exit 1
+  end
+end
diff --git a/config/application.rb b/config/application.rb
index d36275f44..d4b2d1b61 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -14,6 +14,10 @@ Bundler.require(*Rails.groups)
 module Fablab
   class Application < Rails::Application
     require 'fab_manager'
+
+    # Initialize configuration defaults for originally generated Rails version.
+    # config.load_defaults 5.1
+
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration should go into files in config/initializers
     # -- all .rb files in that directory are automatically loaded.
@@ -30,20 +34,10 @@ module Fablab
     config.i18n.default_locale = Rails.application.secrets.rails_locale
     config.i18n.fallbacks = [Rails.application.secrets.app_locale, :en]
 
-    config.assets.paths << Rails.root.join('node_modules').to_s
-
     config.to_prepare do
       Devise::Mailer.layout 'notifications_mailer'
     end
 
-    # allow use rails helpers in angular templates
-    Rails.application.config.assets.configure do |env|
-      env.context_class.class_eval do
-        include ActionView::Helpers
-        include Rails.application.routes.url_helpers
-      end
-    end
-
     config.active_job.queue_adapter = :sidekiq
 
     config.generators do |g|
diff --git a/config/cable.yml b/config/cable.yml
index 0bbde6f74..04aa64721 100644
--- a/config/cable.yml
+++ b/config/cable.yml
@@ -7,3 +7,4 @@ test:
 production:
   adapter: redis
   url: redis://localhost:6379/1
+  channel_prefix: fablab_production
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 49ecfb457..475302274 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -20,7 +20,7 @@ Rails.application.configure do
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => 'public, max-age=172800'
+      'Cache-Control' => "public, max-age=#{2.days.seconds.to_i}"
     }
   else
     config.action_controller.perform_caching = false
@@ -74,7 +74,7 @@ Rails.application.configure do
 
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
-  # config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
 
   config.log_level = Rails.application.secrets.log_level || :debug
 end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 43183c679..37a4056d5 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -17,7 +17,7 @@ Rails.application.configure do
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => 'public, max-age=3600'
+    'Cache-Control' => "public, max-age=#{1.hour.seconds.to_i}"
   }
 
   # Show full error reports and disable caching.
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 90c5cb936..23ba0d052 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,14 +1,27 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
 Rails.application.config.assets.version = '1.0'
 
-# Add additional assets to the asset load path
+# allow use rails helpers in angular templates
+Rails.application.config.assets.configure do |env|
+  env.context_class.class_eval do
+    include ActionView::Helpers
+    include Rails.application.routes.url_helpers
+  end
+end
+
+# Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
+# Add Yarn node_modules folder to the asset load path.
+Rails.application.config.assets.paths << Rails.root.join('node_modules')
 
 # Precompile additional assets.
-# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-# Rails.application.config.assets.precompile += %w( search.js )
+# application.js, application.css, and all non-JS/CSS in the app/assets
+# folder are already added.
+# Rails.application.config.assets.precompile += %w( admin.js admin.css )
 
 Rails.application.config.assets.precompile += %w[
   fontawesome-webfont.eot
diff --git a/config/initializers/new_framework_defaults.rb b/config/initializers/new_framework_defaults.rb
index cbf423a81..9fa84bbea 100644
--- a/config/initializers/new_framework_defaults.rb
+++ b/config/initializers/new_framework_defaults.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 #
 # This file contains migration options to ease your Rails 5.0 upgrade.
@@ -6,6 +8,7 @@
 #
 # Read the Guide for Upgrading Ruby on Rails for more info on each option.
 
+# DEPRECATION WARNING: raise_on_unfiltered_parameters is deprecated and has no effect in Rails 5.1.
 Rails.application.config.action_controller.raise_on_unfiltered_parameters = true
 
 # Enable per-form CSRF tokens. Previous versions had false.
@@ -21,5 +24,6 @@ ActiveSupport.to_time_preserves_timezone = false
 # Require `belongs_to` associations by default. Previous versions had false.
 Rails.application.config.active_record.belongs_to_required_by_default = false
 
+# DEPRECATION WARNING: ActiveSupport.halt_callback_chains_on_return_false= is deprecated and will be removed in Rails 5.2.
 # Do not halt callback chains when a callback returns false. Previous versions had true.
 ActiveSupport.halt_callback_chains_on_return_false = true
diff --git a/config/initializers/new_framework_defaults_5_1.rb b/config/initializers/new_framework_defaults_5_1.rb
new file mode 100644
index 000000000..514117a6e
--- /dev/null
+++ b/config/initializers/new_framework_defaults_5_1.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+# Be sure to restart your server when you modify this file.
+#
+# This file contains migration options to ease your Rails 5.1 upgrade.
+#
+# Once upgraded flip defaults one by one to migrate to the new default.
+#
+# Read the Guide for Upgrading Ruby on Rails for more info on each option.
+
+# Make `form_with` generate non-remote forms.
+Rails.application.config.action_view.form_with_generates_remote_forms = false
+
+# Unknown asset fallback will return the path passed in when the given
+# asset is not present in the asset pipeline.
+# Rails.application.config.assets.unknown_asset_fallback = false
+
+# ActiveSupport::Deprecation.silenced = true
diff --git a/config/puma.rb b/config/puma.rb
index c7f311f81..1e19380dc 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,13 +1,13 @@
 # Puma can serve each request in a thread from an internal thread pool.
-# The `threads` method setting takes two numbers a minimum and maximum.
+# The `threads` method setting takes two numbers: a minimum and maximum.
 # Any libraries that use thread pools should be configured to match
 # the maximum value specified for Puma. Default is set to 5 threads for minimum
-# and maximum, this matches the default thread size of Active Record.
+# and maximum; this matches the default thread size of Active Record.
 #
-threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }.to_i
+threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
 threads threads_count, threads_count
 
-# Specifies the `port` that Puma will listen on to receive requests, default is 3000.
+# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
 port        ENV.fetch("PORT") { 3000 }
 
@@ -32,16 +32,25 @@ environment ENV.fetch("RAILS_ENV") { "development" }
 #
 # preload_app!
 
+# If you are preloading your application and using Active Record, it's
+# recommended that you close any connections to the database before workers
+# are forked to prevent connection leakage.
+#
+# before_fork do
+#   ActiveRecord::Base.connection_pool.disconnect! if defined?(ActiveRecord)
+# end
+
 # The code in the `on_worker_boot` will be called if you are using
 # clustered mode by specifying a number of `workers`. After each worker
-# process is booted this block will be run, if you are using `preload_app!`
-# option you will want to use this block to reconnect to any threads
-# or connections that may have been created at application boot, Ruby
+# process is booted, this block will be run. If you are using the `preload_app!`
+# option, you will want to use this block to reconnect to any threads
+# or connections that may have been created at application boot, as Ruby
 # cannot share connections between processes.
 #
 # on_worker_boot do
 #   ActiveRecord::Base.establish_connection if defined?(ActiveRecord)
 # end
+#
 
 # Allow puma to be restarted by `rails restart` command.
 plugin :tmp_restart
diff --git a/test/integration/abuses_test.rb b/test/integration/abuses_test.rb
index 2a0b5bbfe..030145105 100644
--- a/test/integration/abuses_test.rb
+++ b/test/integration/abuses_test.rb
@@ -1,5 +1,6 @@
-class AbusesTest < ActionDispatch::IntegrationTest
+# frozen_string_literal: true
 
+class AbusesTest < ActionDispatch::IntegrationTest
   # Called before every test method runs. Can be used
   # to set up fixture information.
   def setup
@@ -18,21 +19,21 @@ class AbusesTest < ActionDispatch::IntegrationTest
     project = Project.take
 
     post '/api/abuses',
-         {
-             abuse: {
-                 signaled_type: 'Project',
-                 signaled_id: project.id,
-                 first_name: 'William',
-                 last_name: 'Prindle',
-                 email: 'wprindle@iastate.edu',
-                 message: 'This project is in infringement with the patent US5014921 A.'
-             }
+         params: {
+           abuse: {
+             signaled_type: 'Project',
+             signaled_id: project.id,
+             first_name: 'William',
+             last_name: 'Prindle',
+             email: 'wprindle@iastate.edu',
+             message: 'This project is in infringement with the patent US5014921 A.'
+           }
          }.to_json,
-         default_headers
+         headers: default_headers
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct object was signaled
     abuse = json_response(response.body)
@@ -42,7 +43,7 @@ class AbusesTest < ActionDispatch::IntegrationTest
     # Check notifications were sent for every admins
     notifications = Notification.where(notification_type_id: NotificationType.find_by_name('notify_admin_abuse_reported'), attached_object_type: 'Abuse', attached_object_id: abuse[:reporting][:id])
     assert_not_empty notifications, 'no notifications were created'
-    notified_users_ids = notifications.map {|n| n.receiver_id }
+    notified_users_ids = notifications.map(&:receiver_id)
     User.admins.each do |adm|
       assert_includes notified_users_ids, adm.id, "Admin #{adm.id} was not notified"
     end
@@ -53,20 +54,19 @@ class AbusesTest < ActionDispatch::IntegrationTest
     project = Project.first
 
     post '/api/abuses',
-         {
-             abuse: {
-                 signaled_type: 'Project',
-                 signaled_id: project.id,
-                 first_name: 'John',
-                 last_name: 'Wrong',
-                 email: '',
-                 message: ''
-             }
+         params: {
+           abuse: {
+             signaled_type: 'Project',
+             signaled_id: project.id,
+             first_name: 'John',
+             last_name: 'Wrong',
+             email: '',
+             message: ''
+           }
          }.to_json,
-         default_headers
+         headers: default_headers
 
     assert_equal 422, response.status, response.body
     assert_match /can't be blank/, response.body
   end
-
 end
diff --git a/test/integration/accounting_period_test.rb b/test/integration/accounting_period_test.rb
index 9a4162c07..3d6bdd394 100644
--- a/test/integration/accounting_period_test.rb
+++ b/test/integration/accounting_period_test.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 class AccountingPeriodTest < ActionDispatch::IntegrationTest
-
   def setup
     @admin = User.find_by(username: 'admin')
     login_as(@admin, scope: :user)
@@ -12,16 +11,16 @@ class AccountingPeriodTest < ActionDispatch::IntegrationTest
     end_at = '2012-12-31T00:00:00.000Z'
 
     post '/api/accounting_periods',
-         {
+         params: {
            accounting_period: {
              start_at: start_at,
              end_at: end_at
            }
-         }.to_json, default_headers
+         }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct period was closed successfully
     period = json_response(response.body)
@@ -39,16 +38,16 @@ class AccountingPeriodTest < ActionDispatch::IntegrationTest
     diff = (end_at.to_date - start_at.to_date).to_i
 
     post '/api/accounting_periods',
-         {
+         params: {
            accounting_period: {
              start_at: start_at,
              end_at: end_at
            }
-         }.to_json, default_headers
+         }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # check the error
     assert_match(/#{I18n.t('errors.messages.invalid_duration', DAYS: diff)}/, response.body)
@@ -59,16 +58,16 @@ class AccountingPeriodTest < ActionDispatch::IntegrationTest
     end_at = '2015-02-27T00:00:00.000Z'
 
     post '/api/accounting_periods',
-         {
+         params: {
            accounting_period: {
              start_at: start_at,
              end_at: end_at
            }
-         }.to_json, default_headers
+         }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # check the error
     assert_match(/#{I18n.t('errors.messages.cannot_overlap')}/, response.body)
@@ -79,16 +78,16 @@ class AccountingPeriodTest < ActionDispatch::IntegrationTest
     end_at = Date.today.end_of_day.iso8601
 
     post '/api/accounting_periods',
-         {
+         params: {
            accounting_period: {
              start_at: start_at,
              end_at: end_at
            }
-         }.to_json, default_headers
+         }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # check the error
     assert_match(/#{I18n.t('errors.messages.must_be_in_the_past')}/, response.body)
diff --git a/test/integration/admins_test.rb b/test/integration/admins_test.rb
index 27896002a..bd4e314ca 100644
--- a/test/integration/admins_test.rb
+++ b/test/integration/admins_test.rb
@@ -1,5 +1,6 @@
-class AdminsTest < ActionDispatch::IntegrationTest
+# frozen_string_literal: true
 
+class AdminsTest < ActionDispatch::IntegrationTest
   # Called before every test method runs. Can be used
   # to set up fixture information.
   def setup
@@ -16,7 +17,7 @@ class AdminsTest < ActionDispatch::IntegrationTest
 
   test 'create an admin' do
     post '/api/admins',
-         {
+         params: {
            admin: {
              username: 'glepower',
              email: 'gerard.lepower@admins.net',
@@ -36,11 +37,11 @@ class AdminsTest < ActionDispatch::IntegrationTest
              }
            }
          }.to_json,
-         default_headers
+         headers: default_headers
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct admin was created
     admin = json_response(response.body)
@@ -54,10 +55,9 @@ class AdminsTest < ActionDispatch::IntegrationTest
   test 'list all admins' do
     get '/api/admins'
 
-
     # Check response format & status
     assert_equal 200, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the list items are ok
     admins = json_response(response.body)
diff --git a/test/integration/availabilities/as_admin_test.rb b/test/integration/availabilities/as_admin_test.rb
index 0b2a1f6c2..524baf742 100644
--- a/test/integration/availabilities/as_admin_test.rb
+++ b/test/integration/availabilities/as_admin_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Availabilities
   class AsAdminTest < ActionDispatch::IntegrationTest
     setup do
@@ -12,7 +14,7 @@ module Availabilities
 
       # Check response format & status
       assert_equal 200, response.status
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the correct availability was returned
       availability = json_response(response.body)
@@ -26,7 +28,7 @@ module Availabilities
 
       # Check response format & status
       assert_equal 200, response.status
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the correct availabilities was returned
       availabilities = json_response(response.body)
@@ -50,7 +52,7 @@ module Availabilities
 
       # Check response format & status
       assert_equal 200, response.status
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the correct availabilities was returned
       availabilities = json_response(response.body)
@@ -72,15 +74,14 @@ module Availabilities
 
       # Check response format & status
       assert_equal 200, response.status
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the correct availabilities was returned
       availabilities = json_response(response.body)
       assert_not_empty availabilities, 'no availabilities were found'
       assert_not_nil availabilities[0], 'first availability was unexpectedly nil'
 
-      assert availabilities.map {|a| a[:available_type] }.include?('space'), 'space availability not found instead that it was enabled'
+      assert availabilities.map { |a| a[:available_type] }.include?('space'), 'space availability not found instead that it was enabled'
     end
   end
 end
-
diff --git a/test/integration/availabilities/as_user_test.rb b/test/integration/availabilities/as_user_test.rb
index bfb9007b1..6c2026fcc 100644
--- a/test/integration/availabilities/as_user_test.rb
+++ b/test/integration/availabilities/as_user_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Availabilities::AsUserTest < ActionDispatch::IntegrationTest
   setup do
     user = User.find_by(username: 'kdumas')
@@ -11,7 +13,7 @@ class Availabilities::AsUserTest < ActionDispatch::IntegrationTest
 
     # Check response format & status
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct availabilities was returned
     availabilities = json_response(response.body)
@@ -27,8 +29,7 @@ class Availabilities::AsUserTest < ActionDispatch::IntegrationTest
 
     # Check that we don't get availabilities in more than a month
     availabilities.each do |a|
-      assert_not a[:start] > 1.month.from_now , 'retrieved a slot in more than 1 month for user who has no yearly subscription'
+      assert_not a[:start] > 1.month.from_now, 'retrieved a slot in more than 1 month for user who has no yearly subscription'
     end
   end
 end
-
diff --git a/test/integration/credits/machine_test.rb b/test/integration/credits/machine_test.rb
index dac006de3..f47fdc8f5 100644
--- a/test/integration/credits/machine_test.rb
+++ b/test/integration/credits/machine_test.rb
@@ -2,7 +2,6 @@
 
 module Credits
   class TrainingTest < ActionDispatch::IntegrationTest
-
     # Called before every test method runs. Can be used
     # to set up fixture information.
     def setup
@@ -11,10 +10,9 @@ module Credits
     end
 
     test 'create machine credit' do
-
       # First, we create a new credit
       post '/api/credits',
-           {
+           params: {
              credit: {
                creditable_id: 5,
                creditable_type: 'Machine',
@@ -22,11 +20,11 @@ module Credits
                plan_id: 1
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the credit was created correctly
       credit = json_response(response.body)
@@ -39,7 +37,7 @@ module Credits
 
     test 'update a credit' do
       put '/api/credits/13',
-          {
+          params: {
             credit: {
               creditable_id: 4,
               creditable_type: 'Machine',
@@ -47,11 +45,11 @@ module Credits
               plan_id: 3
             }
           }.to_json,
-          default_headers
+          headers: default_headers
 
       # Check response format & status
       assert_equal 200, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the credit was correctly updated
       credit = json_response(response.body)
@@ -62,4 +60,4 @@ module Credits
       assert_equal 5, c.hours
     end
   end
-end
\ No newline at end of file
+end
diff --git a/test/integration/credits/training_test.rb b/test/integration/credits/training_test.rb
index 44631b6d2..9390611fb 100644
--- a/test/integration/credits/training_test.rb
+++ b/test/integration/credits/training_test.rb
@@ -1,6 +1,7 @@
+# frozen_string_literal: true
+
 module Credits
   class TrainingTest < ActionDispatch::IntegrationTest
-
     # Called before every test method runs. Can be used
     # to set up fixture information.
     def setup
@@ -9,21 +10,20 @@ module Credits
     end
 
     test 'create training credit' do
-
       # First, we create a new credit
       post '/api/credits',
-           {
+           params: {
              credit: {
                creditable_id: 4,
                creditable_type: 'Training',
-               plan_id: '1',
+               plan_id: '1'
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the credit was created correctly
       credit = json_response(response.body)
@@ -36,18 +36,18 @@ module Credits
 
     test 'create a existing credit' do
       post '/api/credits',
-           {
+           params: {
              credit: {
                creditable_id: 4,
                creditable_type: 'Training',
                plan_id: '2'
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 422, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
     end
   end
-end
\ No newline at end of file
+end
diff --git a/test/integration/events/as_admin_test.rb b/test/integration/events/as_admin_test.rb
index ab4460e86..0228428d3 100644
--- a/test/integration/events/as_admin_test.rb
+++ b/test/integration/events/as_admin_test.rb
@@ -1,17 +1,16 @@
 # frozen_string_literal: true
+
 module Events
   class AsAdminTest < ActionDispatch::IntegrationTest
-
     setup do
       admin = User.with_role(:admin).first
       login_as(admin, scope: :user)
     end
 
     test 'creation modification reservation and re-modification scenario' do
-
       # First, we create a new event
       post '/api/events',
-           {
+           params: {
              event: {
                title: 'OpenLab discovery day',
                description: 'A day to discover the Fablab and try its machines and possibilities.',
@@ -23,11 +22,11 @@ module Events
                amount: 0
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the event was created correctly
       event = json_response(response.body)
@@ -39,21 +38,23 @@ module Events
 
       # Then, modify the event to set a nb of places
       put "/api/events/#{e.id}",
-          event: {
-            title: 'OpenLab discovery day',
-            description: 'A day to discover the Fablab and try its machines and possibilities.',
-            start_date: 1.week.from_now.utc,
-            start_time: 1.week.from_now.utc.change(hour: 16),
-            end_date: 1.week.from_now.utc,
-            end_time: 1.week.from_now.utc.change(hour: 20),
-            category_id: Category.first.id,
-            amount: 0,
-            nb_total_places: 10
+          params: {
+            event: {
+              title: 'OpenLab discovery day',
+              description: 'A day to discover the Fablab and try its machines and possibilities.',
+              start_date: 1.week.from_now.utc,
+              start_time: 1.week.from_now.utc.change(hour: 16),
+              end_date: 1.week.from_now.utc,
+              end_time: 1.week.from_now.utc.change(hour: 20),
+              category_id: Category.first.id,
+              amount: 0,
+              nb_total_places: 10
+            }
           }
 
       # Check response format & status
       assert_equal 200, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the places numbers were updated successfully
       e = Event.where(id: event[:id]).first
@@ -62,7 +63,7 @@ module Events
 
       # Now, let's make a reservation on this event
       post '/api/reservations',
-           {
+           params: {
              reservation: {
                user_id: User.find_by(username: 'pdurand').id,
                reservable_id: e.id,
@@ -78,11 +79,11 @@ module Events
                ]
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the remaining places were updated successfully
       e = Event.where(id: event[:id]).first
@@ -90,21 +91,23 @@ module Events
 
       # Finally, modify the event to add some places
       put "/api/events/#{e.id}",
-          event: {
-            title: 'OpenLab discovery day',
-            description: 'A day to discover the Fablab and try its machines and possibilities.',
-            start_date: 1.week.from_now.utc,
-            start_time: 1.week.from_now.utc.change(hour: 16),
-            end_date: 1.week.from_now.utc,
-            end_time: 1.week.from_now.utc.change(hour: 20),
-            category_id: Category.first.id,
-            amount: 0,
-            nb_total_places: 20
+          params: {
+            event: {
+              title: 'OpenLab discovery day',
+              description: 'A day to discover the Fablab and try its machines and possibilities.',
+              start_date: 1.week.from_now.utc,
+              start_time: 1.week.from_now.utc.change(hour: 16),
+              end_date: 1.week.from_now.utc,
+              end_time: 1.week.from_now.utc.change(hour: 20),
+              category_id: Category.first.id,
+              amount: 0,
+              nb_total_places: 20
+            }
           }
 
       # Check response format & status
       assert_equal 200, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the places numbers were updated successfully
       e = Event.where(id: event[:id]).first
@@ -113,12 +116,11 @@ module Events
     end
 
     test 'create event with custom price and reserve it with success' do
-
       price_category = PriceCategory.first
 
       # First, we create a new event
       post '/api/events',
-           {
+           params: {
              event: {
                title: 'Electronics initiation',
                description: 'A workshop about electronics and the abilities to create robots.',
@@ -137,11 +139,11 @@ module Events
                ]
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the event was created correctly
       event = json_response(response.body)
@@ -155,7 +157,7 @@ module Events
 
       # Now, let's make a reservation on this event
       post '/api/reservations',
-           {
+           params: {
              reservation: {
                user_id: User.find_by(username: 'lseguin').id,
                reservable_id: e.id,
@@ -177,11 +179,11 @@ module Events
                ]
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the reservation match the required event
       reservation = json_response(response.body)
@@ -197,7 +199,6 @@ module Events
       # Check the resulting invoice generation and it has right price
       assert_invoice_pdf r.invoice
       assert_equal (4 * 20) + (4 * 16), r.invoice.total / 100.0
-
     end
   end
 end
diff --git a/test/integration/events/as_user_test.rb b/test/integration/events/as_user_test.rb
index 491ac94b1..abb37d146 100644
--- a/test/integration/events/as_user_test.rb
+++ b/test/integration/events/as_user_test.rb
@@ -1,8 +1,8 @@
+# frozen_string_literal: true
+
 module Events
   class AsUserTest < ActionDispatch::IntegrationTest
-
     test 'reserve event with many prices and payment means and VAT' do
-
       vlonchamp = User.find_by(username: 'vlonchamp')
       login_as(vlonchamp, scope: :user)
 
@@ -27,7 +27,7 @@ module Events
       # Reserve the 'radio' event
       VCR.use_cassette('reserve_event_with_many_prices_and_payment_means') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -56,7 +56,7 @@ module Events
                  },
                  coupon_code: 'SUNNYFABLAB'
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       vlonchamp.wallet.reload
@@ -80,14 +80,14 @@ module Events
 
       refute invoice.stp_payment_intent_id.blank?
       refute invoice.total.blank?
-      assert_equal 43350, invoice.total # total minus coupon
+      assert_equal 43_350, invoice.total # total minus coupon
 
       # invoice_items assertions
       ## reservation
       reservation_item = invoice.invoice_items.first
 
       assert_not_nil reservation_item
-      assert_equal 51000, reservation_item.amount # full total
+      assert_equal 51_000, reservation_item.amount # full total
 
       # invoice assertions
       invoice = Invoice.find_by(invoiced: reservation)
@@ -109,7 +109,6 @@ module Events
       # notifications
       assert_not_empty Notification.where(attached_object: reservation)
       assert_not_empty Notification.where(attached_object: invoice)
-
     end
   end
 end
diff --git a/test/integration/exports/accounting_export_test.rb b/test/integration/exports/accounting_export_test.rb
index 7a969c3b6..8cf2e32af 100644
--- a/test/integration/exports/accounting_export_test.rb
+++ b/test/integration/exports/accounting_export_test.rb
@@ -3,17 +3,15 @@
 module Exports; end
 
 class Exports::AccountingExportTest < ActionDispatch::IntegrationTest
-
   setup do
     admin = User.with_role(:admin).first
     login_as(admin, scope: :user)
   end
 
   test 'creation modification reservation and re-modification scenario' do
-
     # First, we create a new export
     post '/api/accounting/export',
-         {
+         params: {
            query: {
              columns: %w[journal_code date account_code account_label piece line_label debit_origin credit_origin debit_euro credit_euro lettering],
              encoding: 'ISO-8859-1',
@@ -28,11 +26,11 @@ class Exports::AccountingExportTest < ActionDispatch::IntegrationTest
            type: 'acd',
            key: ';'
          }.to_json,
-         default_headers
+         headers: default_headers
 
     # Check response format & status
     assert_equal 200, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the export was created correctly
     res = json_response(response.body)
@@ -134,10 +132,8 @@ class Exports::AccountingExportTest < ActionDispatch::IntegrationTest
       STDERR.puts "WARNING: unable to test accurately accounting export: invoice #{last_invoice.id} is not a Machine reservation"
     end
 
-
     # Clean CSV file
     require 'fileutils'
     FileUtils.rm(e.file)
   end
 end
-
diff --git a/test/integration/invoices/as_admin_test.rb b/test/integration/invoices/as_admin_test.rb
index 15e9cb993..78342865b 100644
--- a/test/integration/invoices/as_admin_test.rb
+++ b/test/integration/invoices/as_admin_test.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 class InvoicesTest < ActionDispatch::IntegrationTest
-
   # Called before every test method runs. Can be used
   # to set up fixture information.
   def setup
@@ -10,18 +9,18 @@ class InvoicesTest < ActionDispatch::IntegrationTest
   end
 
   test 'admin list invoices' do
-    post '/api/invoices/list', { query: {
+    post '/api/invoices/list', params: { query: {
       number: '',
       customer: '',
       date: nil,
       order_by: '-reference',
       page: 1,
       size: 20 # test db may have < 20 invoices
-    } }.to_json, default_headers
+    } }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 200, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that we have all invoices
     invoices = json_response(response.body)
@@ -35,18 +34,18 @@ class InvoicesTest < ActionDispatch::IntegrationTest
   test 'admin generates a refund' do
     date = DateTime.current.iso8601
 
-    post '/api/invoices', { avoir: {
+    post '/api/invoices', params: { avoir: {
       avoir_date: date,
       payment_method: 'cash',
       description: 'Lorem ipsum',
       invoice_id: 4,
       invoice_items_ids: [4],
       subscription_to_expire: false
-    } }.to_json, default_headers
+    } }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that the refund match
     refund = json_response(response.body)
@@ -68,22 +67,20 @@ class InvoicesTest < ActionDispatch::IntegrationTest
   test 'admin fails generates a refund in closed period' do
     date = '2015-10-01T13:09:55+01:00'.to_datetime
 
-    post '/api/invoices', { avoir: {
+    post '/api/invoices', params: { avoir: {
       avoir_date: date,
       payment_method: 'cash',
       description: 'Unable to refund',
       invoice_id: 5,
       invoice_items_ids: [5],
       subscription_to_expire: false
-    } }.to_json, default_headers
+    } }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
-
+    assert_equal Mime[:json], response.content_type
 
     # Check the error was handled
     assert_match(/#{I18n.t('errors.messages.in_closed_period')}/, response.body)
   end
-
 end
diff --git a/test/integration/members/as_admin_test.rb b/test/integration/members/as_admin_test.rb
index 4c5dc536d..f00c85a75 100644
--- a/test/integration/members/as_admin_test.rb
+++ b/test/integration/members/as_admin_test.rb
@@ -13,7 +13,7 @@ class MembersTest < ActionDispatch::IntegrationTest
     email = 'robert.dubois@gmail.com'
 
     VCR.use_cassette('members_admin_create_success') do
-      post members_path, { user: {
+      post members_path, params: { user: {
         username: 'bob',
         email: email,
         group_id: group_id,
@@ -31,12 +31,12 @@ class MembersTest < ActionDispatch::IntegrationTest
           gender: true,
           birthday: '2018-02-08'
         }
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that the user's match
     user = json_response(response.body)
@@ -48,13 +48,13 @@ class MembersTest < ActionDispatch::IntegrationTest
     user = User.friendly.find('kdumas')
 
     # we cannot update an kevin's group because he's got a running subscription
-    put "/api/members/#{user.id}", { user: {
+    put "/api/members/#{user.id}", params: { user: {
       group_id: 1
-    } }.to_json, default_headers
+    } }.to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check error message
     res = json_response(response.body)
@@ -70,18 +70,18 @@ class MembersTest < ActionDispatch::IntegrationTest
     }
     instagram = 'https://www.instagram.com/vanessa/'
 
-    put "/api/members/#{user.id}", user_hash.deep_merge(
+    put "/api/members/#{user.id}", params: user_hash.deep_merge(
       user: {
         group_id: 2,
         profile_attributes: {
           instagram: instagram
         }
       }
-    ).to_json, default_headers
+    ).to_json, headers: default_headers
 
     # Check response format & status
     assert_equal 200, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check update result
     res = json_response(response.body)
@@ -94,7 +94,7 @@ class MembersTest < ActionDispatch::IntegrationTest
 
   ## Check response format & status
   # assert_equal 200, response.status, response.body
-  # assert_equal Mime::JSON, response.content_type
+  # assert_equal Mime[:json], response.content_type
 
   ## Check search result
   # res = json_response(response.body)
diff --git a/test/integration/members/import_test.rb b/test/integration/members/import_test.rb
index 76c7d6855..d93cef82f 100644
--- a/test/integration/members/import_test.rb
+++ b/test/integration/members/import_test.rb
@@ -9,16 +9,15 @@ class ImportTest < ActionDispatch::IntegrationTest
   end
 
   test 'bulk import members through CSV' do
-
     bulk_csv = fixture_file_upload('files/members.csv', 'text/csv')
     post '/api/imports/members',
-         {
+         params: {
            import_members: bulk_csv,
            update_field: 'id'
-         }, default_headers
+         }, headers: default_headers
 
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that the returned import was created
     import = json_response(response.body)
@@ -66,6 +65,5 @@ class ImportTest < ActionDispatch::IntegrationTest
     assert_equal 'update', res[10][:status], 'wrong operation: jean dupont should have been updated'
     assert res[10][:result], 'wrong result: operation should have succeeded'
     assert_equal res[9][:row]['email'], User.find(res[10][:user]).email, 'jean dupont email was not updated'
-
   end
 end
diff --git a/test/integration/prices/compute_test.rb b/test/integration/prices/compute_test.rb
index a7944c159..ad64e44cd 100644
--- a/test/integration/prices/compute_test.rb
+++ b/test/integration/prices/compute_test.rb
@@ -1,6 +1,7 @@
+# frozen_string_literal: true
+
 module Prices
   class AsAdminTest < ActionDispatch::IntegrationTest
-
     setup do
       admin = User.with_role(:admin).first
       login_as(admin, scope: :user)
@@ -12,7 +13,7 @@ module Prices
       printer_training = availability.trainings.first
 
       post '/api/prices/compute',
-           {
+           params: {
              reservation: {
                user_id: user.id,
                reservable_id: printer_training.id,
@@ -27,11 +28,11 @@ module Prices
                ]
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 200, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the price was computed correctly
       price = json_response(response.body)
@@ -40,7 +41,6 @@ module Prices
                    'Computed price did not match training price'
     end
 
-
     test 'compute price for a machine reservation with an offered slot and a subscription' do
       user = User.find_by(username: 'jdupond')
       availability = Availability.find(3)
@@ -48,7 +48,7 @@ module Prices
       plan = Plan.where(group_id: user.group_id, interval: 'month').first
 
       post '/api/prices/compute',
-           {
+           params: {
              reservation: {
                user_id: user.id,
                reservable_id: laser.id,
@@ -70,11 +70,11 @@ module Prices
                ]
              }
            }.to_json,
-           default_headers
+           headers: default_headers
 
       # Check response format & status
       assert_equal 200, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the event was created correctly
       price = json_response(response.body)
diff --git a/test/integration/reservations/create_as_admin_test.rb b/test/integration/reservations/create_as_admin_test.rb
index 9cca9f9cc..164cb06b9 100644
--- a/test/integration/reservations/create_as_admin_test.rb
+++ b/test/integration/reservations/create_as_admin_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Reservations
   class CreateAsAdminTest < ActionDispatch::IntegrationTest
     setup do
@@ -16,7 +18,7 @@ module Reservations
       invoice_items_count = InvoiceItem.count
       users_credit_count = UsersCredit.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @user_without_subscription.id,
         reservable_id: machine.id,
         reservable_type: machine.class.name,
@@ -27,7 +29,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -73,7 +75,7 @@ module Reservations
       invoice_count = Invoice.count
       invoice_items_count = InvoiceItem.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @user_without_subscription.id,
         reservable_id: training.id,
         reservable_type: training.class.name,
@@ -84,7 +86,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -130,7 +132,7 @@ module Reservations
       invoice_items_count = InvoiceItem.count
       users_credit_count = UsersCredit.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @user_with_subscription.id,
         reservable_id: machine.id,
         reservable_type: machine.class.name,
@@ -146,7 +148,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -203,7 +205,7 @@ module Reservations
       invoice_items_count = InvoiceItem.count
       users_credit_count = UsersCredit.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @vlonchamp.id,
         reservable_id: machine.id,
         reservable_type: machine.class.name,
@@ -214,7 +216,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -273,7 +275,7 @@ module Reservations
       users_credit_count = UsersCredit.count
       wallet_transactions_count = WalletTransaction.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @vlonchamp.id,
         reservable_id: machine.id,
         reservable_type: machine.class.name,
@@ -285,7 +287,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -340,7 +342,7 @@ module Reservations
       invoice_items_count = InvoiceItem.count
       users_credit_count = UsersCredit.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @vlonchamp.id,
         reservable_id: machine.id,
         reservable_type: machine.class.name,
@@ -351,7 +353,7 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
@@ -383,7 +385,7 @@ module Reservations
       invoice_items_count = InvoiceItem.count
       users_credit_count = UsersCredit.count
 
-      post reservations_path, { reservation: {
+      post reservations_path, params: { reservation: {
         user_id: @user_without_subscription.id,
         plan_id: plan.id,
         reservable_id: training.id,
@@ -396,11 +398,11 @@ module Reservations
             availability_id: availability.id
           }
         ]
-      } }.to_json, default_headers
+      } }.to_json, headers: default_headers
 
       # general assertions
       assert_equal 201, response.status
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
       result = json_response(response.body)
 
       # Check the DB objects have been created as they should
diff --git a/test/integration/reservations/create_test.rb b/test/integration/reservations/create_test.rb
index edcad213c..e9d17c1a3 100644
--- a/test/integration/reservations/create_test.rb
+++ b/test/integration/reservations/create_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Reservations
   class CreateTest < ActionDispatch::IntegrationTest
     setup do
@@ -19,7 +21,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_machine_without_subscription_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -34,7 +36,7 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
@@ -89,7 +91,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_machine_without_subscription_error') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method(error: :card_declined),
                cart_items: {
                  reservation: {
@@ -104,12 +106,12 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # Check response format & status
       assert_equal 200, response.status, "API does not return the expected status. #{response.body}"
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the error was handled
       assert_match /Your card was declined/, response.body
@@ -137,7 +139,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_training_without_subscription_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -152,7 +154,7 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
@@ -206,7 +208,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_machine_with_subscription_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -226,7 +228,7 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
@@ -290,7 +292,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_training_with_subscription_success') do
         post '/api/reservations',
-             {
+             params: {
                reservation: {
                  reservable_id: training.id,
                  reservable_type: training.class.name,
@@ -302,7 +304,7 @@ module Reservations
                    }
                  ]
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
@@ -361,7 +363,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_machine_and_pay_wallet_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -378,7 +380,7 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       @vlonchamp.wallet.reload
@@ -445,7 +447,7 @@ module Reservations
 
       VCR.use_cassette('reservations_create_for_training_and_plan_by_pay_wallet_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -461,7 +463,7 @@ module Reservations
                    ]
                  }
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       @vlonchamp.wallet.reload
@@ -523,7 +525,7 @@ module Reservations
 
       VCR.use_cassette('reservations_machine_and_plan_using_coupon_success') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -540,7 +542,7 @@ module Reservations
                  },
                  coupon_code: 'SUNNYFABLAB'
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
@@ -614,7 +616,7 @@ module Reservations
 
       VCR.use_cassette('reservations_training_with_expired_coupon_error') do
         post '/api/payments/confirm_payment',
-             {
+             params: {
                payment_method_id: stripe_payment_method,
                cart_items: {
                  reservation: {
@@ -624,15 +626,15 @@ module Reservations
                    card_token: stripe_payment_method,
                    slots_attributes: [
                      {
-                        start_at: availability.start_at.to_s(:iso8601),
-                        end_at: (availability.start_at + 1.hour).to_s(:iso8601),
-                        availability_id: availability.id
-                      }
+                       start_at: availability.start_at.to_s(:iso8601),
+                       end_at: (availability.start_at + 1.hour).to_s(:iso8601),
+                       availability_id: availability.id
+                     }
                    ]
                  },
                  coupon_code: 'XMAS10'
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
       # general assertions
diff --git a/test/integration/settings_test.rb b/test/integration/settings_test.rb
index 6d7d6498d..c0b2c7deb 100644
--- a/test/integration/settings_test.rb
+++ b/test/integration/settings_test.rb
@@ -1,5 +1,6 @@
-class SettingsTest < ActionDispatch::IntegrationTest
+# frozen_string_literal: true
 
+class SettingsTest < ActionDispatch::IntegrationTest
   # Called before every test method runs. Can be used
   # to set up fixture information.
   def setup
@@ -9,11 +10,13 @@ class SettingsTest < ActionDispatch::IntegrationTest
 
   test 'update setting value' do
     put '/api/settings/fablab_name',
-        setting: {
-          value: 'Test Fablab'
+        params: {
+          setting: {
+            value: 'Test Fablab'
+          }
         }
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     resp = json_response(response.body)
     assert_equal 'fablab_name', resp[:setting][:name]
     assert_equal 'Test Fablab', resp[:setting][:value]
@@ -26,11 +29,12 @@ class SettingsTest < ActionDispatch::IntegrationTest
     assert_includes setting.history_values.map(&:value), 'Test Fablab', 'current parameter was not saved'
   end
 
-
   test 'update setting with wrong name' do
     put '/api/settings/does_not_exists',
-        setting: {
-          value: 'ERROR EXPECTED'
+        params: {
+          setting: {
+            value: 'ERROR EXPECTED'
+          }
         }
     assert_equal 422, response.status
     assert_match /Name is not included in the list/, response.body
@@ -40,10 +44,9 @@ class SettingsTest < ActionDispatch::IntegrationTest
     get '/api/settings/fablab_name'
 
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     resp = json_response(response.body)
     assert_equal 'fablab_name', resp[:setting][:name], 'wrong parameter name'
     assert_equal 'Fab Lab de La Casemate', resp[:setting][:value], 'wrong parameter value'
   end
-
 end
diff --git a/test/integration/subscriptions/create_as_admin_test.rb b/test/integration/subscriptions/create_as_admin_test.rb
index fa7295e29..534ece8bf 100644
--- a/test/integration/subscriptions/create_as_admin_test.rb
+++ b/test/integration/subscriptions/create_as_admin_test.rb
@@ -2,8 +2,6 @@
 
 module Subscriptions
   class CreateAsAdminTest < ActionDispatch::IntegrationTest
-
-
     setup do
       @admin = User.find_by(username: 'admin')
       login_as(@admin, scope: :user)
@@ -15,18 +13,17 @@ module Subscriptions
 
       VCR.use_cassette('subscriptions_admin_create_success') do
         post '/api/subscriptions',
-             {
+             params: {
                subscription: {
                  plan_id: plan.id,
                  user_id: user.id
                }
-             }.to_json, default_headers
+             }.to_json, headers: default_headers
       end
 
-
       # Check response format & status
       assert_equal 201, response.status, response.body
-      assert_equal Mime::JSON, response.content_type
+      assert_equal Mime[:json], response.content_type
 
       # Check the correct plan was subscribed
       subscription = json_response(response.body)
@@ -58,6 +55,5 @@ module Subscriptions
       assert_invoice_pdf invoice
       assert_equal plan.amount, invoice.total, 'Invoice total price does not match the bought subscription'
     end
-
   end
 end
diff --git a/test/integration/subscriptions/create_as_user_test.rb b/test/integration/subscriptions/create_as_user_test.rb
index 1f5376d41..74e83e6d6 100644
--- a/test/integration/subscriptions/create_as_user_test.rb
+++ b/test/integration/subscriptions/create_as_user_test.rb
@@ -1,6 +1,6 @@
+# frozen_string_literal: true
+
 class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
-
-
   setup do
     @user = User.find_by(username: 'jdupond')
     login_as(@user, scope: :user)
@@ -11,19 +11,19 @@ class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_user_create_success') do
       post '/api/payments/confirm_payment',
-           {
+           params: {
              payment_method_id: stripe_payment_method,
              cart_items: {
                subscription: {
                  plan_id: plan.id
                }
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct plan was subscribed
     subscription = json_response(response.body)
@@ -65,27 +65,25 @@ class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
     assert_equal plan.amount, invoice.total, 'Invoice total price does not match the bought subscription'
   end
 
-
-
   test 'user fails to take a subscription' do
     # get plan for wrong group
     plan = Plan.where.not(group_id: @user.group.id).first
 
     VCR.use_cassette('subscriptions_user_create_failed') do
       post '/api/payments/confirm_payment',
-           {
+           params: {
              payment_method_id: stripe_payment_method,
              cart_items: {
                subscription: {
                  plan_id: plan.id
                }
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 422, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the error was handled
     assert_match /plan is not compatible/, response.body
@@ -94,7 +92,6 @@ class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
     assert_nil @user.subscription, "user's subscription was found"
   end
 
-
   test 'user successfully takes a subscription with wallet' do
     @vlonchamp = User.find_by(username: 'vlonchamp')
     login_as(@vlonchamp, scope: :user)
@@ -102,21 +99,21 @@ class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_user_create_success_with_wallet') do
       post '/api/payments/confirm_payment',
-           {
+           params: {
              payment_method_id: stripe_payment_method,
              cart_items: {
                subscription: {
                  plan_id: plan.id
                }
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     @vlonchamp.wallet.reload
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct plan was subscribed
     subscription = json_response(response.body)
@@ -138,7 +135,8 @@ class Subscriptions::CreateAsUserTest < ActionDispatch::IntegrationTest
     assert_equal 10,
                  (printer.prices.find_by(
                    group_id: @vlonchamp.group_id,
-                   plan_id: @vlonchamp.subscription.plan_id).amount / 100.00
+                   plan_id: @vlonchamp.subscription.plan_id
+                 ).amount / 100.00
                  ),
                  'machine hourly price does not match'
 
diff --git a/test/integration/subscriptions/renew_as_admin_test.rb b/test/integration/subscriptions/renew_as_admin_test.rb
index b2ba7883b..92adf17fd 100644
--- a/test/integration/subscriptions/renew_as_admin_test.rb
+++ b/test/integration/subscriptions/renew_as_admin_test.rb
@@ -1,28 +1,28 @@
-class Subscriptions::RenewAsAdminTest < ActionDispatch::IntegrationTest
+# frozen_string_literal: true
 
+class Subscriptions::RenewAsAdminTest < ActionDispatch::IntegrationTest
   setup do
     @admin = User.find_by(username: 'admin')
     login_as(@admin, scope: :user)
   end
 
   test 'admin successfully renew a subscription before it has ended' do
-
     user = User.find_by(username: 'kdumas')
     plan = Plan.find_by(base_name: 'Mensuel tarif réduit')
 
     VCR.use_cassette('subscriptions_admin_renew_success') do
       post '/api/subscriptions',
-           {
+           params: {
              subscription: {
                plan_id: plan.id,
                user_id: user.id
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct plan was subscribed
     subscription = json_response(response.body)
@@ -74,17 +74,17 @@ class Subscriptions::RenewAsAdminTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_admin_offer_free_days') do
       put "/api/subscriptions/#{subscription.id}",
-          {
+          params: {
             subscription: {
               expired_at: new_date.strftime('%Y-%m-%d %H:%M:%S.%9N Z'),
               free: true
             }
-          }.to_json, default_headers
+          }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 200, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that the subscribed plan was not altered
     res_subscription = json_response(response.body)
@@ -114,16 +114,16 @@ class Subscriptions::RenewAsAdminTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_admin_extends_subscription') do
       put "/api/subscriptions/#{subscription.id}",
-          {
+          params: {
             subscription: {
               expired_at: new_date.strftime('%Y-%m-%d %H:%M:%S.%9N Z')
             }
-          }.to_json, default_headers
+          }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 201, response.status, response.body
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check that the subscribed plan is still the same
     res_subscription = json_response(response.body)
@@ -145,5 +145,4 @@ class Subscriptions::RenewAsAdminTest < ActionDispatch::IntegrationTest
     assert_not_nil notification, 'user notification was not created'
     assert_equal user.id, notification.receiver_id, 'wrong user notified'
   end
-
 end
diff --git a/test/integration/subscriptions/renew_as_user_test.rb b/test/integration/subscriptions/renew_as_user_test.rb
index 117efac12..8f694626a 100644
--- a/test/integration/subscriptions/renew_as_user_test.rb
+++ b/test/integration/subscriptions/renew_as_user_test.rb
@@ -1,6 +1,6 @@
+# frozen_string_literal: true
+
 class Subscriptions::RenewAsUserTest < ActionDispatch::IntegrationTest
-
-
   setup do
     @user = User.find_by(username: 'lseguin')
     login_as(@user, scope: :user)
@@ -12,19 +12,19 @@ class Subscriptions::RenewAsUserTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_user_renew_success', erb: true) do
       post '/api/payments/confirm_payment',
-           {
+           params: {
              payment_method_id: stripe_payment_method,
              cart_items: {
                subscription: {
                  plan_id: plan.id
                }
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 201, response.status, "API does not return the expected status. #{response.body}"
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the correct plan was subscribed
     subscription = json_response(response.body)
@@ -69,8 +69,6 @@ class Subscriptions::RenewAsUserTest < ActionDispatch::IntegrationTest
     assert_equal plan.amount, invoice.total, 'Invoice total price does not match the bought subscription'
   end
 
-
-
   test 'user fails to renew a subscription' do
     plan = Plan.find_by(group_id: @user.group.id, type: 'Plan', base_name: 'Mensuel')
 
@@ -78,19 +76,19 @@ class Subscriptions::RenewAsUserTest < ActionDispatch::IntegrationTest
 
     VCR.use_cassette('subscriptions_user_renew_failed') do
       post '/api/payments/confirm_payment',
-           {
+           params: {
              payment_method_id: stripe_payment_method(error: :card_declined),
              cart_items: {
                subscription: {
                  plan_id: plan.id
                }
              }
-           }.to_json, default_headers
+           }.to_json, headers: default_headers
     end
 
     # Check response format & status
     assert_equal 200, response.status, "API does not return the expected status. #{response.body}"
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
 
     # Check the error was handled
     assert_match /Your card was declined/, response.body
@@ -100,7 +98,5 @@ class Subscriptions::RenewAsUserTest < ActionDispatch::IntegrationTest
 
     # Check the subscription was not saved
     assert_equal 1, @user.subscriptions.count
-
   end
-
 end
diff --git a/test/integration/wallets_test.rb b/test/integration/wallets_test.rb
index fa3f6f47a..b0c711a26 100644
--- a/test/integration/wallets_test.rb
+++ b/test/integration/wallets_test.rb
@@ -1,5 +1,6 @@
-class WalletsTest < ActionDispatch::IntegrationTest
+# frozen_string_literal: true
 
+class WalletsTest < ActionDispatch::IntegrationTest
   # Called before every test method runs. Can be used
   # to set up fixture information.
   def setup
@@ -17,7 +18,7 @@ class WalletsTest < ActionDispatch::IntegrationTest
   test 'get my wallet' do
     get "/api/wallet/by_user/#{@vlonchamp.id}"
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     wallet = json_response(response.body)
     assert_equal @vlonchamp.wallet.invoicing_profile_id, wallet[:invoicing_profile_id]
     assert_equal @vlonchamp.wallet.amount, wallet[:amount]
@@ -29,7 +30,7 @@ class WalletsTest < ActionDispatch::IntegrationTest
     @user1 = User.first
     get "/api/wallet/by_user/#{@user1.id}"
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     wallet = json_response(response.body)
     assert_equal @user1.wallet.invoicing_profile_id, wallet[:invoicing_profile_id]
     assert_equal @user1.wallet.amount, wallet[:amount]
@@ -45,7 +46,7 @@ class WalletsTest < ActionDispatch::IntegrationTest
     w = @vlonchamp.wallet
     get "/api/wallet/#{w.id}/transactions"
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     transactions = json_response(response.body)
     assert_equal w.wallet_transactions.count, transactions.size
     assert_equal wallet_transactions(:transaction1).id, transactions.first[:id]
@@ -64,10 +65,10 @@ class WalletsTest < ActionDispatch::IntegrationTest
     amount = 10.5
     expected_amount = w.amount + amount
     put "/api/wallet/#{w.id}/credit",
-        amount: amount
+        params: { amount: amount }
 
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     wallet = json_response(response.body)
     w.reload
     assert_equal w.amount, expected_amount
@@ -77,7 +78,6 @@ class WalletsTest < ActionDispatch::IntegrationTest
     assert_empty Invoice.where(invoiced: w.wallet_transactions.last)
   end
 
-
   test 'admin credit wallet with refund invoice generation' do
     admin = users(:user_1)
     login_as(admin, scope: :user)
@@ -86,13 +86,15 @@ class WalletsTest < ActionDispatch::IntegrationTest
     avoir_date = DateTime.current.end_of_day
     expected_amount = w.amount + amount
     put "/api/wallet/#{w.id}/credit",
-        amount: amount,
-        avoir: true,
-        avoir_date: avoir_date,
-        avoir_description: 'Some text'
+        params: {
+          amount: amount,
+          avoir: true,
+          avoir_date: avoir_date,
+          avoir_description: 'Some text'
+        }
 
     assert_equal 200, response.status
-    assert_equal Mime::JSON, response.content_type
+    assert_equal Mime[:json], response.content_type
     wallet = json_response(response.body)
     w.reload
     assert_equal w.amount, expected_amount