diff --git a/spec/factories/ticket/time_accounting.rb b/spec/factories/ticket/time_accounting.rb
index 18aab839b..faca6270f 100644
--- a/spec/factories/ticket/time_accounting.rb
+++ b/spec/factories/ticket/time_accounting.rb
@@ -1,7 +1,11 @@
 FactoryBot.define do
-  factory :ticket_time_accounting, class: Ticket::TimeAccounting do
+  factory :'ticket/time_accounting', aliases: %i[ticket_time_accounting] do
     ticket
     time_unit { rand(100) }
     created_by_id 1
+
+    trait :for_article do
+      ticket_article { create(:'ticket/article', ticket: ticket) }
+    end
   end
 end
diff --git a/spec/models/ticket/time_accounting_spec.rb b/spec/models/ticket/time_accounting_spec.rb
new file mode 100644
index 000000000..3b65d57c7
--- /dev/null
+++ b/spec/models/ticket/time_accounting_spec.rb
@@ -0,0 +1,27 @@
+require 'rails_helper'
+
+RSpec.describe Ticket::TimeAccounting, type: :model do
+  subject(:time_accounting) { create(:'ticket/time_accounting') }
+
+  describe 'Associations:' do
+    describe '#ticket_article' do
+      subject!(:time_accounting) { create(:'ticket/time_accounting', :for_article) }
+
+      context 'when destroyed' do
+        it 'destroys self' do
+          expect { time_accounting.ticket_article.destroy }
+            .to change { time_accounting.persisted? }.to(false)
+            .and change { Ticket::TimeAccounting.count }.by(-1)
+        end
+
+        it 'does not destroy other TimeAccountings for same ticket' do
+          create(:'ticket/time_accounting', ticket: time_accounting.ticket)
+          create(:'ticket/time_accounting', :for_article, ticket: time_accounting.ticket)
+
+          expect { time_accounting.ticket_article.destroy }
+            .to change { Ticket::TimeAccounting.count }.by(-1)
+        end
+      end
+    end
+  end
+end
diff --git a/test/unit/ticket_article_time_accouting_test.rb b/test/unit/ticket_article_time_accouting_test.rb
deleted file mode 100644
index e59990b04..000000000
--- a/test/unit/ticket_article_time_accouting_test.rb
+++ /dev/null
@@ -1,117 +0,0 @@
-require 'test_helper'
-
-class TicketArticleTimeAccoutingTest < ActiveSupport::TestCase
-
-  test 'destroy dependent time accounting for ticket and article' do
-    ticket_test = Ticket.create(
-      title:         'com test 1',
-      group:         Group.lookup(name: 'Users'),
-      customer_id:   2,
-      state:         Ticket::State.lookup(name: 'new'),
-      priority:      Ticket::Priority.lookup(name: '2 normal'),
-      updated_by_id: 1,
-      created_by_id: 1,
-    )
-    assert(ticket_test, 'ticket created')
-
-    article_test1 = Ticket::Article.create(
-      ticket_id:     ticket_test.id,
-      from:          'some_customer_com-1@example.com',
-      to:            'some_zammad_com-1@example.com',
-      subject:       'com test 1',
-      message_id:    'some@id_com_1',
-      body:          'some message 123',
-      internal:      false,
-      sender:        Ticket::Article::Sender.find_by(name: 'Customer'),
-      type:          Ticket::Article::Type.find_by(name: 'email'),
-      updated_by_id: 1,
-      created_by_id: 1,
-    )
-
-    Ticket::TimeAccounting.create!(
-      ticket_id:         ticket_test.id,
-      ticket_article_id: article_test1.id,
-      time_unit:         10,
-      created_by_id:     1,
-    )
-
-    article_test2 = Ticket::Article.create(
-      ticket_id:     ticket_test.id,
-      from:          'some_customer_com-1@example.com',
-      to:            'some_zammad_com-1@example.com',
-      subject:       'com test 1',
-      message_id:    'some@id_com_1',
-      body:          'some message 123',
-      internal:      false,
-      sender:        Ticket::Article::Sender.find_by(name: 'Customer'),
-      type:          Ticket::Article::Type.find_by(name: 'email'),
-      updated_by_id: 1,
-      created_by_id: 1,
-    )
-
-    Ticket::TimeAccounting.create!(
-      ticket_id:         ticket_test.id,
-      ticket_article_id: article_test2.id,
-      time_unit:         10,
-      created_by_id:     1,
-    )
-
-    article_test3 = Ticket::Article.create(
-      ticket_id:     ticket_test.id,
-      from:          'some_customer_com-1@example.com',
-      to:            'some_zammad_com-1@example.com',
-      subject:       'com test 1',
-      message_id:    'some@id_com_1',
-      body:          'some message 123',
-      internal:      false,
-      sender:        Ticket::Article::Sender.find_by(name: 'Customer'),
-      type:          Ticket::Article::Type.find_by(name: 'email'),
-      updated_by_id: 1,
-      created_by_id: 1,
-    )
-
-    Ticket::TimeAccounting.create!(
-      ticket_id:         ticket_test.id,
-      ticket_article_id: article_test3.id,
-      time_unit:         10,
-      created_by_id:     1,
-    )
-
-    Ticket::TimeAccounting.create!(
-      ticket_id:     ticket_test.id,
-      time_unit:     10,
-      created_by_id: 1,
-    )
-
-    time_accouting_list = Ticket::TimeAccounting.where(
-      ticket_id: ticket_test.id,
-    )
-
-    found = time_accouting_list.select { |t| t.ticket_article_id.in?([article_test1.id, article_test2.id, article_test3.id]) }
-    assert_equal(3, found.count)
-
-    article_test1.destroy
-
-    time_accouting_list.reload
-    found = time_accouting_list.select { |t| t.ticket_article_id.in?([article_test1.id, article_test2.id, article_test3.id]) }
-    assert_equal(2, found.count)
-
-    article_test2.destroy
-
-    time_accouting_list.reload
-    found = time_accouting_list.select { |t| t.ticket_article_id.in?([article_test1.id, article_test2.id, article_test3.id]) }
-    assert_equal(1, found.count)
-
-    article_test3.destroy
-
-    time_accouting_list.reload
-    found = time_accouting_list.select { |t| t.ticket_article_id.in?([article_test1.id, article_test2.id, article_test3.id]) }
-    assert_equal(0, found.count)
-
-    # one accouting left for the ticket only
-    assert_equal(1, time_accouting_list.count)
-    ticket_test.destroy
-    time_accouting_list.reload
-    assert_equal(0, time_accouting_list.count)
-  end
-end