diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 58675e978..d53ea8a74 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -135,8 +135,8 @@ test:rspec:postgresql:
   script:
     - bundle exec rake zammad:db:init
     - bundle exec rake test:units
-    - bundle exec ruby -I test/ test/integration/object_manager_test.rb
-    - bundle exec ruby -I test/ test/integration/package_test.rb
+    - bundle exec rails test test/integration/object_manager_test.rb
+    - bundle exec rails test test/integration/package_test.rb
 
 test:unit:mysql:
   stage: test
@@ -162,32 +162,32 @@ test:integration:email_helper_deliver:
   <<: *requires_mail_port_access
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/email_helper_test.rb
-    - bundle exec ruby -I test/ test/integration/email_deliver_test.rb
-    - bundle exec ruby -I test/ test/integration/email_keep_on_server_test.rb
+    - bundle exec rails test test/integration/email_helper_test.rb
+    - bundle exec rails test test/integration/email_deliver_test.rb
+    - bundle exec rails test test/integration/email_keep_on_server_test.rb
 
 test:integration:facebook:
   <<: *test_integration_definition
   script:
     - bundle exec rake zammad:db:init
-    - bundle exec ruby -I test/ test/integration/facebook_test.rb
+    - bundle exec rails test test/integration/facebook_test.rb
   allow_failure: true
 
 test:integration:geo:
   <<: *test_integration_definition
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/geo_calendar_test.rb
-    - bundle exec ruby -I test/ test/integration/geo_location_test.rb
-    - bundle exec ruby -I test/ test/integration/geo_ip_test.rb
+    - bundle exec rails test test/integration/geo_calendar_test.rb
+    - bundle exec rails test test/integration/geo_location_test.rb
+    - bundle exec rails test test/integration/geo_ip_test.rb
 
 test:integration:user_agent:
   <<: *test_integration_definition
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/user_agent_test.rb
+    - bundle exec rails test test/integration/user_agent_test.rb
     - export ZAMMAD_PROXY_TEST=true
-    - bundle exec ruby -I test/ test/integration/user_agent_test.rb
+    - bundle exec rails test test/integration/user_agent_test.rb
   allow_failure: true
 
 test:integration:slack:
@@ -196,13 +196,13 @@ test:integration:slack:
     - bundle exec rake zammad:db:unseeded
     - echo "gem 'slack-api'" >> Gemfile.local
     - bundle install -j $(nproc)
-    - bundle exec ruby -I test test/integration/slack_test.rb
+    - bundle exec rails test test/integration/slack_test.rb
 
 test:integration:clearbit:
   <<: *test_integration_definition
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test test/integration/clearbit_test.rb
+    - bundle exec rails test test/integration/clearbit_test.rb
   allow_failure: true
 
 ### Elasticsearch
@@ -216,9 +216,9 @@ test:integration:clearbit:
     ES_URL: "http://elasticsearch:9200"
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/elasticsearch_active_test.rb
-    - bundle exec ruby -I test/ test/integration/elasticsearch_test.rb
-    - bundle exec ruby -I test/ test/integration/report_test.rb
+    - bundle exec rails test test/integration/elasticsearch_active_test.rb
+    - bundle exec rails test test/integration/elasticsearch_test.rb
+    - bundle exec rails test test/integration/report_test.rb
     - bundle exec rspec --tag searchindex
 
 test:integration:es_mysql:
@@ -247,7 +247,7 @@ test:integration:es_postgresql:
     RAILS_ENV: "test"
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/zendesk_import_test.rb
+    - bundle exec rails test test/integration/zendesk_import_test.rb
   allow_failure: true
 
 test:integration:zendesk_mysql:
@@ -265,7 +265,7 @@ test:integration:zendesk_postgresql:
   stage: test
   script:
     - bundle exec rake zammad:db:unseeded
-    - bundle exec ruby -I test/ test/integration/otrs_import_test.rb
+    - bundle exec rails test test/integration/otrs_import_test.rb
 
 .variables_integration_otrs_6_template: &variables_integration_otrs_6_definition
   variables:
@@ -458,7 +458,7 @@ test:browser:integration:api_client_php:
     - script/build/test_slice_tests.sh $TEST_SLICE
     - RAILS_ENV=test bundle exec rake db:create
     - bundle exec rake zammad:ci:test:start[with_elasticsearch]
-    - bundle exec rake test:browser
+    - time bundle exec rails test --fail-fast test/browser
 
 .test_browser_core_postgresql_template: &test_browser_core_postgresql_definition
   <<: *test_browser_core_definition
@@ -665,7 +665,7 @@ test:browser:core:chrome_6_postgresql:
     - RAILS_ENV=test bundle exec rake db:create
     - cp $AUTO_WIZARD_FILE auto_wizard.json
     - bundle exec rake zammad:ci:test:start
-    - bundle exec ruby -I test/ $TEST_FILE
+    - bundle exec rails test $TEST_FILE
 
 .browser_core_auto_wizard_template: &browser_core_auto_wizard_definition
   <<: *test_browser_core_definition
@@ -746,7 +746,7 @@ test:browser:integration:idoit_chrome:
   script:
     - RAILS_ENV=test bundle exec rake db:create
     - bundle exec rake zammad:ci:test:start
-    - bundle exec ruby -I test/ $TEST_FILE
+    - bundle exec rails test $TEST_FILE
 
 test:browser:integration:otrs_chrome:
   <<: *browser_integration_import_definition
diff --git a/lib/tasks/test_browser.rake b/lib/tasks/test_browser.rake
deleted file mode 100644
index d6c280484..000000000
--- a/lib/tasks/test_browser.rake
+++ /dev/null
@@ -1,20 +0,0 @@
-$LOAD_PATH << './lib'
-require 'rubygems'
-
-namespace :test do
-  desc 'Start browser tests'
-  task :browser, [:opts] => :environment do |_t, args|
-
-    start = Time.zone.now
-    if !args.opts
-      args.opts = ''
-    end
-    Dir.glob('test/browser/*_test.rb').sort.each do |r|
-      sh "#{args.opts} ruby -Itest #{r}" do |ok, res|
-        raise 'Failed test. ' + res.inspect if !ok
-      end
-    end
-    puts 'All browser tests, elapsed: ' + (Time.zone.now - start).to_s + ' seconds'
-
-  end
-end
diff --git a/test/browser_test_helper.rb b/test/browser_test_helper.rb
index 891a92dc6..3b76c8d7e 100644
--- a/test/browser_test_helper.rb
+++ b/test/browser_test_helper.rb
@@ -6,10 +6,35 @@ require 'json'
 require 'net/http'
 require 'uri'
 
-class TestCase < Test::Unit::TestCase
+# This is a workaround for running the browser test suite
+# in an alphabetical order
+# because `test/browser/aaa_*` tests are required to run first
+require 'minitest'
+module Minitest
+  def self.__run(reporter, options)
+    Runnable.runnables
+            .reject { |s| s.runnable_methods.empty? }
+            .map { |suite| suite.run reporter, options }
+  end
+end
+
+class TestCase < ActiveSupport::TestCase
 
   DEBUG = true
 
+  setup do
+    # print current test case to STDOUT
+    # for status reasoning and debugging purposes
+    source_location  = self.class.instance_method(method_name).source_location
+    test_file_path   = source_location[0].remove("#{Rails.root}/") # rubocop:disable Rails/FilePath
+    test_method_line = source_location[1]
+    puts <<~HTML
+
+      Performing test #{self.class.name}##{method_name} (#{test_file_path}:#{test_method_line}):
+
+    HTML
+  end
+
   def browser
     ENV['BROWSER'] || 'firefox'
   end