diff --git a/helpers/openAIHelper.py b/helpers/openAIHelper.py
index c68db12..29a81e0 100644
--- a/helpers/openAIHelper.py
+++ b/helpers/openAIHelper.py
@@ -65,9 +65,9 @@ async def chatGPT_req(message, tg_chat, type: _TYPES, model='gpt-3.5-turbo', ini
         system_content = f"""Important: Provide ONLY the requested form in the output and no other text!!!"""
 
     messages = [
-            {"role": "system", "content": system_content},
-            {"role": "user", "content": message}
-        ]
+        {"role": "system", "content": system_content},
+        {"role": "user", "content": message}
+    ]
     if examples and len(examples) > 0:
         messages.append(examples)
     chatgpt_response = openai.ChatCompletion.create(
@@ -99,6 +99,7 @@ def parse_response(response, tg_chat, words_limit, type, initial_text):
     else:
         return message
 
+
 def parse_reminder_probability(text):
     return_val = parse_json(text)
     if 'reminder_probability' in return_val:
@@ -110,15 +111,14 @@ def parse_reminder_probability(text):
     else:
         return 5
 
+
 def parse_json(text):
     pattern = r"{.*}"
     json_dict = {}
     text = "{" + text.split("{", 1)[1]  # remove the text before the JSON
-    text = text.split("}", 1)[0] + "}" # remove the text after the JSON
+    text = text.split("}", 1)[0] + "}"  # remove the text after the JSON
     text = text.replace("\'", "\"")
     text = replace_bools(text)
-    print(text)
-    print(type(text))
     try:
         return json.loads(text)
     except Exception as e:
@@ -131,5 +131,6 @@ def parse_json(text):
         print(json_dict)
     return json_dict
 
+
 def replace_bools(text):
-    return text.replace('True', 'true').replace('False', 'false')
\ No newline at end of file
+    return text.replace('True', 'true').replace('False', 'false')
diff --git a/service_routine/tests.py b/service_routine/tests.py
deleted file mode 100644
index 7ce503c..0000000
--- a/service_routine/tests.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
new file mode 100644
index 0000000..73c4ba3
--- /dev/null
+++ b/tests/test_helpers.py
@@ -0,0 +1,221 @@
+import unittest
+
+from asgiref.sync import async_to_sync
+
+from helpers import MessageHistoryHelpers
+from helpers.openAIHelper import *
+from helpers.DatabaseHelpers import *
+from django.test import TestCase
+from telegram import Message
+
+class ParseResponseCase(TestCase):
+    input_text = "Here is your output: {'is_reminder': True, 'is_event': False}"
+    output_parsable_expected = "Here is your output: {'is_reminder': true, 'is_event': false}"
+    output_parsed_json = {"is_reminder": True, "is_event": False}
+
+    def test_bool_replaced(self):
+        self.assertEqual(replace_bools(self.input_text), self.output_parsable_expected)
+
+    def test_parse_json(self):
+        self.assertEqual(parse_json(self.input_text), self.output_parsed_json)
+
+class DatabaseHelpersTest(TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        cls.DB_NAME = 'test_db'
+        cls.db_handle, cls.client = get_db_handle(db_name=cls.DB_NAME)
+        cls.collection_name = 'test_collection'
+        cls.collection_handle = get_collection_handle(cls.db_handle, cls.collection_name)
+        cls.chat_id = '12345'
+        cls.language = 'en'
+        cls.chat_data = {
+            "chat_id": cls.chat_id,
+            "counter": 0,
+            "language": cls.language,
+            "is_approved": False
+        }
+        cls.chat = Chat.objects.create(
+            chat_id=cls.chat_data['chat_id'],
+            counter=cls.chat_data['counter'],
+            language=cls.chat_data['language'],
+            is_approved=cls.chat_data['is_approved']
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.client.drop_database(cls.DB_NAME)
+        cls.client.close()
+
+    def test_get_db_handle(self):
+        db_handle, client = get_db_handle(db_name=self.DB_NAME)
+        self.assertIsNotNone(db_handle)
+        self.assertIsNotNone(client)
+        self.assertIsInstance(db_handle, MongoClient)
+        self.assertIsInstance(client, MongoClient)
+        self.assertEqual(db_handle.name, self.DB_NAME)
+
+    def test_get_collection_handle(self):
+        collection_handle = get_collection_handle(self.db_handle, self.collection_name)
+        self.assertIsNotNone(collection_handle)
+        self.assertIsInstance(collection_handle, MongoClient)
+
+    def test_get_chat(self):
+        chat = get_chat(self.chat_id)
+        self.assertIsNotNone(chat)
+        self.assertIsInstance(chat, Chat)
+        self.assertEqual(chat.chat_id, self.chat_id)
+
+    def test_get_creator(self):
+        creator = get_creator()
+        self.assertIsNotNone(creator)
+        self.assertIsInstance(creator, Chat)
+        self.assertEqual(creator.pk, 1)
+
+    def test_set_language(self):
+        language = 'fr'
+        set_language(self.chat_id, language)
+        chat = get_chat(self.chat_id)
+        self.assertEqual(chat.language, language)
+
+    def test_set_approved(self):
+        set_approved(self.chat_id, True)
+        chat = get_chat(self.chat_id)
+        self.assertTrue(chat.is_approved)
+
+    def test_tick_counter(self):
+        chat = get_chat(self.chat_id)
+        prev_counter = chat.counter
+        tick_counter(self.chat_id)
+        chat = get_chat(self.chat_id)
+        self.assertEqual(chat.counter, prev_counter + 1)
+
+    def test_tick_tokens(self):
+        chat = get_chat(self.chat_id)
+        prev_tokens = chat.tokens_used
+        tokens = 5
+        tick_tokens(self.chat_id, tokens)
+        chat = get_chat(self.chat_id)
+        self.assertEqual(chat.tokens_used, prev_tokens + tokens)
+
+    def test_assign_last_conversation(self):
+        conversation = 'test_conversation'
+        assign_last_conversation(self.chat_id, conversation)
+        chat = get_chat(self.chat_id)
+        self.assertEqual(chat.last_conversation, conversation)
+
+    def test_assign_last_conversation(self):
+        conversation = 'test_conversation'
+        assign_last_conversation(self.chat_id, conversation)
+        chat = get_chat(self.chat_id)
+        self.assertEqual(chat.last_conversation, conversation)
+
+    def test_return_records_list(self):
+        records_list = return_records_list([1, 2, 3, 4, 5])
+        self.assertIsNotNone(records_list)
+        self.assertIsInstance(records_list, list)
+        self.assertEqual(records_list, [1, 2, 3, 4, 5])
+
+    def test_return_single_record(self):
+        record = return_single_record(123)
+        self.assertIsNotNone(record)
+        self.assertIsInstance(record, int)
+        self.assertEqual(record, 123)
+
+    @async_to_sync
+    async def test_async_get_chat(self):
+        chat = await async_get_chat(self.chat_id)
+        self.assertIsNotNone(chat)
+        self.assertIsInstance(chat, Chat)
+        self.assertEqual(chat.chat_id, self.chat_id)
+
+    @async_to_sync
+    async def test_async_get_creator(self):
+        creator = await async_get_creator()
+        self.assertIsNotNone(creator)
+        self.assertIsInstance(creator, Chat)
+        self.assertEqual(creator.pk, 1)
+
+    @async_to_sync
+    async def test_async_set_language(self):
+        language = 'fr'
+        await async_set_language(self.chat_id, language)
+        chat = await async_get_chat(self.chat_id)
+        self.assertEqual(chat.language, language)
+
+    @async_to_sync
+    async def test_async_set_approved(self):
+        await async_set_approved(self.chat_id, True)
+        chat = await async_get_chat(self.chat_id)
+        self.assertTrue(chat.is_approved)
+
+    @async_to_sync
+    async def test_async_tick_counter(self):
+        chat = await async_get_chat(self.chat_id)
+        prev_counter = chat.counter
+        await async_tick_counter(self.chat_id)
+        chat = await async_get_chat(self.chat_id)
+        self.assertEqual(chat.counter, prev_counter + 1)
+
+    @async_to_sync
+    async def test_async_tick_tokens(self):
+        chat = await async_get_chat(self.chat_id)
+        prev_tokens = chat.tokens_used
+        tokens = 5
+        await async_tick_tokens(self.chat_id, tokens)
+        chat = await async_get_chat(self.chat_id)
+        self.assertEqual(chat.tokens_used, prev_tokens + tokens)
+
+    @async_to_sync
+    async def test_async_assign_last_conversation(self):
+        conversation = 'test_conversation'
+        await async_assign_last_conversation(self.chat_id, conversation)
+        chat = await async_get_chat(self.chat_id)
+        self.assertEqual(chat.last_conversation, conversation)
+
+
+class TestMessageHistoryHelpers(unittest.TestCase):
+    def setUp(self):
+        # Инициализация объекта MessageHistoryHelpers
+        self.message_history_helpers = MessageHistoryHelpers()
+
+    def tearDown(self):
+        # Удаление временных данных после тестирования
+        # (например, удаление записей из базы данных)
+        pass
+
+    def test_insert_input_message(self):
+        # Тест метода insert_input_message
+        # Создание тестового сообщения
+        in_msg = Message(chat_id=1, date=1234567890, message_id=1, chat=None, text='Test message')
+        # Вызов метода insert_input_message
+        result = self.message_history_helpers.insert_input_message(in_msg)
+        # Проверка наличия результата
+        self.assertIsNotNone(result)
+
+    def test_insert_response(self):
+        # Тест метода insert_response
+        # Создание тестового сообщения
+        in_msg = Message(chat_id=1, date=1234567890, message_id=1, chat=None, text='Test message')
+        response_text = 'Test response'
+        tokens_used = 5
+        # Вызов метода insert_response
+        result = self.message_history_helpers.insert_response(in_msg, response_text, tokens_used)
+        # Проверка наличия результата
+        self.assertIsNotNone(result)
+
+    def test_get_messages_for_user(self):
+        # Тест метода get_messages_for_user
+        user_id = 1
+        # Вызов метода get_messages_for_user
+        result = self.message_history_helpers.get_messages_for_user(user_id)
+        # Проверка типа результата
+        self.assertIsInstance(result, list)
+
+    def test_get_last_user_messages(self):
+        # Тест метода get_last_user_messages
+        user_id = 1
+        # Вызов метода get_last_user_messages
+        result = self.message_history_helpers.get_last_user_messages(user_id)
+        # Проверка типа результата
+        self.assertIsInstance(result, list)
diff --git a/tg_bot/tests.py b/tg_bot/tests.py
index 7ce503c..6f79d4c 100644
--- a/tg_bot/tests.py
+++ b/tg_bot/tests.py
@@ -1,3 +1,29 @@
 from django.test import TestCase
+from tg_bot.models import Chat
 
-# Create your tests here.
+
+class ChatTestCase(TestCase):
+    def setUp(self):
+        Chat.objects.create(chat_id="chat1", counter=0, tokens_used=0, is_approved=False,
+                            role='none', language='english', last_conversation='', username='',
+                            current_mode='chatGPT')
+
+        Chat.objects.create(chat_id="chat2", counter=0, tokens_used=0, is_approved=False,
+                            role='none', language='english', last_conversation='', username='',
+                            current_mode='chatGPT')
+
+    def test_money_used(self):
+        """Test money_used() method of Chat model"""
+        chat1 = Chat.objects.get(chat_id="chat1")
+        chat2 = Chat.objects.get(chat_id="chat2")
+        self.assertEqual(chat1.money_used(), '$ 0.0')  # Ожидаемое значение при counter=0, tokens_used=0
+        self.assertEqual(chat2.money_used(), '$ 0.0')  # Ожидаемое значение при counter=0, tokens_used=0
+
+        # Изменяем значения полей и проверяем результат
+        chat1.expenses = 10
+        chat1.save()
+        chat2.expenses = 0.2
+        chat2.save()
+
+        self.assertEqual(chat1.money_used(), f'$ {chat1.expenses}')  # Ожидаемое значение при counter=10, tokens_used=100
+        self.assertEqual(chat2.money_used(), f'$ {chat2.expenses}')