diff --git a/public/assets/form/form.js b/public/assets/form/form.js
index ef4dda770..54615edc6 100644
--- a/public/assets/form/form.js
+++ b/public/assets/form/form.js
@@ -33,6 +33,7 @@ $(function() {
         name: 'email',
         tag: 'input',
         type: 'email',
+        required: true,
         placeholder: 'Your Email',
         defaultValue: function () {return User.email;},
       },
@@ -40,6 +41,7 @@ $(function() {
         display: 'Message',
         name: 'body',
         tag: 'textarea',
+        required: true,
         placeholder: 'Your Message...',
         defaultValue: '',
         rows: 7,
@@ -76,6 +78,8 @@ $(function() {
         name: 'name',
         tag: 'input',
         type: 'text',
+        id: 'zammad-form-name',
+        required: true,
         placeholder: 'Your Name',
         defaultValue: '',
       },
@@ -84,6 +88,8 @@ $(function() {
         name: 'email',
         tag: 'input',
         type: 'email',
+        id: 'zammad-form-email',
+        required: true,
         placeholder: 'Your Email',
         defaultValue: '',
       },
@@ -91,6 +97,8 @@ $(function() {
         display: 'Message',
         name: 'body',
         tag: 'textarea',
+        id: 'zammad-form-body',
+        required: true,
         placeholder: 'Your Message...',
         defaultValue: '',
         rows: 7,
@@ -396,14 +404,15 @@ $(function() {
       $form.append('<h2>' + this.options.messageTitle + '</h2>')
     }
     $.each(this.options.attributes, function(index, value) {
-      var item = $('<div class="form-group"><label>' + _this.T(value.display) + '</label></div>');
+      var valueId = _this.options.modal ? value.id + '-modal' : value.id + '-inline'
+      var item = $('<div class="form-group"><label for="' + valueId +'"> ' + _this.T(value.display) + '</label></div>');
       var defaultValue = (typeof value.defaultValue === 'function') ? value.defaultValue() : value.defaultValue;
       for (var i=0; i < (value.repeat ? value.repeat : 1); i++) {
         if (value.tag == 'input') {
-          item.append('<input class="form-control" name="' + value.name + '" type="' + value.type + '" placeholder="' + _this.T(value.placeholder) + '" value="' + (defaultValue || '') + '">')
+          item.append('<input class="form-control" id="' + valueId + '" name="' + value.name + '" type="' + value.type + '" placeholder="' + _this.T(value.placeholder) + '" value="' + (defaultValue || '') + '"' + (value.required === true ? ' required' : '') + '>')
         }
         else if (value.tag == 'textarea') {
-          item.append('<textarea class="form-control" name="' + value.name + '" placeholder="' + _this.T(value.placeholder) + '" rows="' + value.rows + '">' + (defaultValue || '') + '</textarea>')
+          item.append('<textarea class="form-control" id="' + valueId + '" name="' + value.name + '" placeholder="' + _this.T(value.placeholder) + '" rows="' + value.rows + '"' + (value.required === true ? ' required' : '') + '>' + (defaultValue || '') + '</textarea>')
         }
       }
       $form.append(item)
diff --git a/script/build/test_slice_tests.sh b/script/build/test_slice_tests.sh
index 64acc5367..916b32565 100755
--- a/script/build/test_slice_tests.sh
+++ b/script/build/test_slice_tests.sh
@@ -59,7 +59,6 @@ if [ "$LEVEL" == '1' ]; then
   rm test/browser/customer_ticket_create_fields_test.rb
   rm test/browser/customer_ticket_create_test.rb
   rm test/browser/first_steps_test.rb
-  # test/browser/form_test.rb
   rm test/browser/integration_test.rb
   rm test/browser/keyboard_shortcuts_test.rb
   # test/browser/maintenance_app_version_test.rb
@@ -135,7 +134,6 @@ elif [ "$LEVEL" == '2' ]; then
   rm test/browser/customer_ticket_create_fields_test.rb
   rm test/browser/customer_ticket_create_test.rb
   rm test/browser/first_steps_test.rb
-  rm test/browser/form_test.rb
   rm test/browser/integration_test.rb
   rm test/browser/keyboard_shortcuts_test.rb
   rm test/browser/maintenance_app_version_test.rb
@@ -211,7 +209,6 @@ elif [ "$LEVEL" == '3' ]; then
   rm test/browser/customer_ticket_create_fields_test.rb
   rm test/browser/customer_ticket_create_test.rb
   rm test/browser/first_steps_test.rb
-  rm test/browser/form_test.rb
   rm test/browser/integration_test.rb
   rm test/browser/keyboard_shortcuts_test.rb
   rm test/browser/maintenance_app_version_test.rb
@@ -287,7 +284,6 @@ elif [ "$LEVEL" == '4' ]; then
   # test/browser/customer_ticket_create_fields_test.rb
   # test/browser/customer_ticket_create_test.rb
   rm test/browser/first_steps_test.rb
-  rm test/browser/form_test.rb
   rm test/browser/integration_test.rb
   rm test/browser/keyboard_shortcuts_test.rb
   rm test/browser/maintenance_app_version_test.rb
@@ -362,7 +358,6 @@ elif [ "$LEVEL" == '5' ]; then
   rm test/browser/customer_ticket_create_fields_test.rb
   rm test/browser/customer_ticket_create_test.rb
   rm test/browser/first_steps_test.rb
-  rm test/browser/form_test.rb
   rm test/browser/integration_test.rb
   rm test/browser/keyboard_shortcuts_test.rb
   rm test/browser/maintenance_app_version_test.rb
@@ -440,7 +435,6 @@ elif [ "$LEVEL" == '6' ]; then
   rm test/browser/customer_ticket_create_fields_test.rb
   rm test/browser/customer_ticket_create_test.rb
   # test/browser/first_steps_test.rb
-  rm test/browser/form_test.rb
   # test/browser/integration_test.rb
   # test/browser/keyboard_shortcuts_test.rb
   rm test/browser/maintenance_app_version_test.rb
diff --git a/spec/support/capybara/browser_test_helper.rb b/spec/support/capybara/browser_test_helper.rb
index 4ba739c04..241662591 100644
--- a/spec/support/capybara/browser_test_helper.rb
+++ b/spec/support/capybara/browser_test_helper.rb
@@ -68,6 +68,12 @@ module BrowserTestHelper
   #  await_empty_ajax_queue
   #
   def await_empty_ajax_queue
+    # page.evaluate_script silently discards any present alerts, which is not desired.
+    begin
+      return if page.driver.browser.switch_to.alert
+    rescue Selenium::WebDriver::Error::NoSuchAlertError # rubocop:disable Lint/SuppressedException
+    end
+
     wait(5, interval: 0.1).until_constant do
       page.evaluate_script('App.Ajax.queue().length').zero?
     end
diff --git a/spec/support/custom_matchers/system/form_matchers/have_validation_message.rb b/spec/support/custom_matchers/system/form_matchers/have_validation_message.rb
new file mode 100644
index 000000000..bf016bec7
--- /dev/null
+++ b/spec/support/custom_matchers/system/form_matchers/have_validation_message.rb
@@ -0,0 +1,53 @@
+# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
+
+module FormMatchers
+  module HaveValidationMessage
+    extend RSpec::Matchers::DSL
+
+    matcher :have_validation_message_for do |field|
+
+      match { check_field(field) && form_field_found? && validation_message_found? }
+      description { 'have a non empty validation message' }
+
+      failure_message do
+        if form_field_found? && !validation_message_found?
+          %(expected to find the field '#{field}' with a validation message, found #{field} with no validation message)
+        else
+          %(expected to find the field '#{field}' with a validation message)
+        end
+      end
+
+      failure_message_when_negated do
+        if form_field_found? && validation_message_found?
+          %(expected not to find the field '#{field}' with a validation message, but did)
+        else
+          %(expected not to find a validation message)
+        end
+      end
+
+      def validation_message_found?
+        actual
+        .find(field)
+        .native
+        .attribute('validationMessage')
+        .present?
+      end
+
+      def form_field_found?
+        actual.has_css?(field)
+      end
+
+      def field
+        @check_field
+      end
+
+      def check_field(field)
+        @check_field ||= field
+      end
+    end
+  end
+end
+
+RSpec.configure do |config|
+  config.include FormMatchers::HaveValidationMessage, type: :system
+end
diff --git a/spec/system/form_spec.rb b/spec/system/form_spec.rb
new file mode 100644
index 000000000..f98732249
--- /dev/null
+++ b/spec/system/form_spec.rb
@@ -0,0 +1,175 @@
+# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
+
+require 'rails_helper'
+
+RSpec.describe 'Form', type: :system, authenticated_as: true do
+
+  shared_examples 'validating form fields' do
+    it 'validate name input' do
+      within form_context do
+        fill_in 'Email', with: 'discard@znuny.com'
+        fill_in 'Message', with: 'message here'
+        click_on 'Submit'
+
+        expect(page).to have_validation_message_for(name_input)
+      end
+    end
+
+    it 'validate email input' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Message', with: 'message here'
+        click_on 'Submit'
+
+        expect(page).to have_validation_message_for(email_input)
+      end
+    end
+
+    it 'validate message input' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Email', with: 'discard@znuny.com'
+        click_on 'Submit'
+
+        expect(page).to have_validation_message_for(body_input)
+      end
+    end
+
+    it 'validate email format' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Email', with: 'invalidformat'
+        click_on 'Submit'
+
+        expect(page).to have_validation_message_for(email_input)
+      end
+    end
+
+    it 'validate email field with non existing domain space' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Message', with: 'message here'
+        fill_in 'Email', with: 'somebody@notexistinginanydomainspacealsonothere.nowhere'
+        sleep 10
+        click_on 'Submit'
+
+        expect(page).to have_selector('.has-error [name=email]').and have_no_selector('button[type="submit"][disabled]')
+      end
+    end
+  end
+
+  shared_examples 'submitting valid form fields' do
+    it 'submits form filled slowly succesfully' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Message', with: 'message here'
+        fill_in 'Email', with: 'discard@znuny.com'
+        sleep 10
+        click_on 'Submit'
+
+        expect(page).to have_text('Thank you for your inquiry')
+      end
+    end
+
+    it 'fails to submit form filled too fast' do
+      within form_context do
+        fill_in 'Name', with: 'some sender'
+        fill_in 'Message', with: 'message here'
+        fill_in 'Email', with: 'discard@znuny.com'
+        click_on 'Submit'
+        accept_alert('Sorry, you look like an robot!')
+      end
+    end
+  end
+
+  context 'with in-app form' do
+    let(:path) { 'channels/form' }
+    let(:feedback_modal_button) { '.js-formBtn' }
+
+    context 'when form is inline' do
+      let(:form_context) { '.js-formInline form.zammad-form' }
+      let(:name_input) { '#zammad-form-name-inline' }
+      let(:body_input) { '#zammad-form-body-inline' }
+      let(:email_input) { '#zammad-form-email-inline' }
+
+      before do
+        visit path
+        uncheck 'Start modal dialog for form.', { allow_label_click: true }
+      end
+
+      it_behaves_like 'validating form fields'
+    end
+
+    context 'when form is modal' do
+      let(:form_context) { '.js-zammad-form-modal-body form.zammad-form' }
+      let(:name_input) { '#zammad-form-name-modal' }
+      let(:body_input) { '#zammad-form-body-modal' }
+      let(:email_input) { '#zammad-form-email-modal' }
+
+      before do
+        visit path
+        find(feedback_modal_button).click
+      end
+
+      it_behaves_like 'validating form fields'
+    end
+
+    it 'shows an inline form' do
+      visit path
+      uncheck 'Start modal dialog for form.', { allow_label_click: true }
+      expect(page).to have_selector('.js-formInline').and have_no_selector('.js-formInline.hide')
+    end
+  end
+
+  context 'with external form' do
+    let(:path) { '/assets/form/form.html' }
+    let(:feedback_modal_button) { '#feedback-form-modal' }
+    let(:form_inline_selector) { '#feedback-form-inline form.zammad-form' }
+
+    context 'when feature is enabled' do
+      before do
+        visit 'channels/form'
+        check 'form_ticket_create', { allow_label_click: true }
+      end
+
+      context 'when form is inline' do
+        let(:form_context) { form_inline_selector }
+        let(:name_input) { '#zammad-form-name-inline' }
+        let(:body_input) { '#zammad-form-body-inline' }
+        let(:email_input) { '#zammad-form-email-inline' }
+
+        before { visit path }
+
+        it_behaves_like 'validating form fields'
+        it_behaves_like 'submitting valid form fields'
+      end
+
+      context 'when form is modal' do
+        let(:form_context) { '.js-zammad-form-modal-body form.zammad-form' }
+        let(:name_input) { '#zammad-form-name-modal' }
+        let(:body_input) { '#zammad-form-body-modal' }
+        let(:email_input) { '#zammad-form-email-modal' }
+
+        before do
+          visit path
+          find(feedback_modal_button).click
+        end
+
+        it_behaves_like 'validating form fields'
+        it_behaves_like 'submitting valid form fields'
+      end
+    end
+
+    context 'when feature is disabled' do
+      before do
+        visit 'channels/form'
+        uncheck 'form_ticket_create', { allow_label_click: true }
+        visit path
+      end
+
+      it 'fails to load form' do
+        expect(page).to have_text('Faild to load form config, feature is disabled')
+      end
+    end
+  end
+end
diff --git a/test/browser/form_test.rb b/test/browser/form_test.rb
deleted file mode 100644
index 22f3be877..000000000
--- a/test/browser/form_test.rb
+++ /dev/null
@@ -1,353 +0,0 @@
-# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
-
-require 'browser_test_helper'
-
-class FormTest < TestCase
-
-  def test_basic
-    agent = browser_instance
-    login(
-      browser:  agent,
-      username: 'master@example.com',
-      password: 'test',
-      url:      browser_url,
-    )
-    tasks_close_all(
-      browser: agent,
-    )
-
-    # disable form
-    click(
-      browser: agent,
-      css:     'a[href="#manage"]',
-    )
-    click(
-      browser: agent,
-      css:     '.content.active a[href="#channels/form"]',
-    )
-    switch(
-      browser: agent,
-      css:     '.content.active .js-formSetting',
-      type:    'off',
-    )
-
-    # admin preview test
-    sleep 1
-    click(
-      browser: agent,
-      css:     '.content.active .js-formBtn',
-    )
-
-    sleep 10
-    set(
-      browser: agent,
-      css:     'body div.zammad-form-modal [name="name"]',
-      value:   'some sender',
-    )
-    set(
-      browser: agent,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   '',
-    )
-    click(
-      browser: agent,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: agent,
-      css:     'body div.zammad-form-modal .has-error [name="body"]',
-    )
-    watch_for_disappear(
-      browser: agent,
-      css:     'body div.zammad-form-modal button[type="submit"][disabled]',
-    )
-    set(
-      browser: agent,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   'new body',
-    )
-    set(
-      browser: agent,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'somebody@notexistinginanydomainspacealsonothere.nowhere',
-    )
-    click(
-      browser: agent,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: agent,
-      css:     'body div.zammad-form-modal .has-error [name="email"]',
-    )
-    watch_for_disappear(
-      browser: agent,
-      css:     'body div.zammad-form-modal button[type="submit"][disabled]',
-    )
-    set(
-      browser: agent,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    click(
-      browser: agent,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: agent,
-      css:     'body div.zammad-form-modal',
-      value:   'Thank you for your inquiry',
-    )
-    # click on backgroud (not on thank you dialog)
-    element = agent.find_elements({ css: 'body div.zammad-form-modal' })[0]
-    agent.action.move_to(element, 200, 200).perform
-    agent.action.click.perform
-
-    customer = browser_instance
-    location(
-      browser: customer,
-      url:     "#{browser_url}/assets/form/form.html",
-    )
-    watch_for(
-      browser: customer,
-      css:     '.js-logDisplay',
-      value:   'Faild to load form config, feature is disabled',
-    )
-    switch(
-      browser: agent,
-      css:     '.content.active .js-formSetting',
-      type:    'on',
-    )
-
-    reload(
-      browser: customer,
-    )
-    sleep 4
-    match_not(
-      browser: customer,
-      css:     '.js-logDisplay',
-      value:   'Faild to load form config, feature is disabled',
-    )
-
-    exists_not(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-    )
-
-    # modal dialog
-    click(
-      browser: customer,
-      css:     '#feedback-form-modal',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-    )
-
-    # fill form valid data - but too fast
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="name"]',
-      value:   'some name',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   "some text\nnew line",
-    )
-    click(
-      browser:      customer,
-      css:          'body div.zammad-form-modal button[type="submit"]',
-      expect_alert: true,
-    )
-
-    sleep 10
-
-    # fill form invalid data - within correct time
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="name"]',
-      value:   'some name',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'invalid_email',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   "some text\nnew line",
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    sleep 10
-    exists(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-    )
-
-    # fill form valid data
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-      value:   'Thank you for your inquiry',
-    )
-
-    # click on backgroud (not on thank you dialog)
-    element = customer.find_elements({ css: 'body div.zammad-form-modal' })[0]
-    customer.action.move_to(element, 200, 200).perform
-    customer.action.click.perform
-
-    sleep 1
-    exists_not(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-    )
-
-    # fill form invalid data - within correct time
-    click(
-      browser: customer,
-      css:     '#feedback-form-modal',
-    )
-    sleep 10
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="name"]',
-      value:   '',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   "some text\nnew line",
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal .has-error [name="name"]',
-    )
-    watch_for_disappear(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"][disabled]',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="name"]',
-      value:   'some sender',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   '',
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal .has-error [name="body"]',
-    )
-    watch_for_disappear(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"][disabled]',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="body"]',
-      value:   'new body',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'somebody@notexistinginanydomainspacealsonothere.nowhere',
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal .has-error [name="email"]',
-    )
-    watch_for_disappear(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"][disabled]',
-    )
-    set(
-      browser: customer,
-      css:     'body div.zammad-form-modal [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    click(
-      browser: customer,
-      css:     'body div.zammad-form-modal button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-      value:   'Thank you for your inquiry',
-    )
-
-    # click on backgroud (not on thank you dialog)
-    element = customer.find_elements({ css: 'body div.zammad-form-modal' })[0]
-    customer.action.move_to(element, 200, 200).perform
-    customer.action.click.perform
-
-    sleep 1
-    exists_not(
-      browser: customer,
-      css:     'body div.zammad-form-modal',
-    )
-
-    # inline form
-    set(
-      browser: customer,
-      css:     '.zammad-form [name="name"]',
-      value:   'Some Name',
-    )
-    set(
-      browser: customer,
-      css:     '.zammad-form [name="email"]',
-      value:   'discard@znuny.com',
-    )
-    set(
-      browser: customer,
-      css:     '.zammad-form [name="body"]',
-      value:   'some text',
-    )
-    click(
-      browser: customer,
-      css:     '.zammad-form button[type="submit"]',
-    )
-    watch_for(
-      browser: customer,
-      css:     '.zammad-form',
-      value:   'Thank you for your inquiry',
-    )
-  end
-
-end