diff --git a/tests/test_answer_schema.py b/tests/test_answer_schema.py
new file mode 100644
index 0000000..f2ea45e
--- /dev/null
+++ b/tests/test_answer_schema.py
@@ -0,0 +1,16 @@
+import unittest
+from schema.answer import Answer
+from schema.status import Status
+
+
+class TestAnswerSchema(unittest.TestCase):
+    def test_answer_creation(self):
+        status = Status.success
+        message = "Test message"
+        answer = Answer(status=status, message=message)
+        self.assertEqual(answer.status, status)
+        self.assertEqual(answer.message, message)
+
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/tests/test_base_controller.py b/tests/test_base_controller.py
new file mode 100644
index 0000000..20ee5d9
--- /dev/null
+++ b/tests/test_base_controller.py
@@ -0,0 +1,34 @@
+import unittest
+from controller.base_controller import BaseController
+
+class TestBaseController(unittest.TestCase):
+    def setUp(self):
+        self.controller = BaseController()
+
+    def test_check_namespace_restricted(self):
+        restricted_namespaces = [
+            "__history",
+            "__last_request",
+            "__last",
+            "__clear",
+            "docs",
+            "redoc",
+            "api",
+        ]
+        for namespace in restricted_namespaces:
+            result = self.controller.check_namespace(namespace)
+            self.assertFalse(result)
+
+    def test_check_namespace_allowed(self):
+        allowed_namespaces = [
+            "test",
+            "example",
+            "namespace",
+            "custom",
+        ]
+        for namespace in allowed_namespaces:
+            result = self.controller.check_namespace(namespace)
+            self.assertTrue(result)
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file
diff --git a/tests/test_history_controller.py b/tests/test_history_controller.py
new file mode 100644
index 0000000..978750b
--- /dev/null
+++ b/tests/test_history_controller.py
@@ -0,0 +1,122 @@
+import unittest
+from fastapi import Response, status
+from schema.answer import Answer
+from schema.request_data import RequestData
+from manager.history import History
+from controller.history_controller import HistoryController
+from schema.status import Status
+from unittest import IsolatedAsyncioTestCase
+from schema.methods import Methods
+from typing import Any
+
+class TestHistoryController(IsolatedAsyncioTestCase):
+    def setUp(self):
+        self.namespace = "test"
+        self.namespace_invalid = "api"
+        self.request_data: dict[Any, Any] = {
+            "data": {},
+            "method": Methods.GET,
+            "url": "https://example.com",
+            "headers": {"Content-Type": "application/json"},
+            "time": "2024-01-01 12:00:00",
+        }
+
+        self.controller = HistoryController()
+        self.history = History(namespace=self.namespace)
+
+    async def test_history_invalid_namespace(self):
+        response = Response()
+        result = await self.controller.history(
+            response=response, namespace=self.namespace_invalid
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+        self.assertEqual(
+            result,
+            Answer(status=Status.error, message="Invalid namespace name provided."),
+        )
+
+    async def test_history_with_id_existing_request(self):
+        self.history.add(self.request_data)
+        response = Response()
+        result = await self.controller.history(response, id=0, namespace=self.namespace)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(result, RequestData(**self.request_data))
+
+    async def test_history_with_id_non_existing_request(self):
+        self.history.clear()
+        response = Response()
+        result = await self.controller.history(
+            response=response, id=0, namespace=self.namespace
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(
+            result, Answer(status=Status.error, message="No requests found.")
+        )
+
+    async def test_history_without_id(self):
+        self.history.clear()
+        self.history.add(self.request_data)
+        response = Response()
+        result = await self.controller.history(
+            response=response, namespace=self.namespace
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(result, [RequestData(**self.request_data)])
+
+    async def test_last_requests_invalid_namespace(self):
+        response = Response()
+        result = await self.controller.last_requests(
+            response, namespace=self.namespace_invalid
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+        self.assertEqual(
+            result,
+            Answer(status=Status.error, message="Invalid namespace name provided."),
+        )
+
+    async def test_last_requests_existing_request(self):
+        self.history.clear()
+        self.history.add(self.request_data)
+        response = Response()
+        result = await self.controller.last_requests(
+            response=response, namespace=self.namespace
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(result, RequestData(**self.request_data))
+
+    async def test_last_requests_non_existing_request(self):
+        self.history.clear()
+        response = Response()
+        result = await self.controller.last_requests(
+            response=response, namespace=self.namespace
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(
+            result, Answer(status=Status.error, message="No requests found.")
+        )
+
+    async def test_clear_history_invalid_namespace(self):
+        response = Response()
+        result = await self.controller.clear_history(
+            response=response, namespace=self.namespace_invalid
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+        self.assertEqual(
+            result,
+            Answer(status=Status.error, message="Invalid namespace name provided."),
+        )
+
+    async def test_clear_history(self):
+        response = Response()
+        self.history.add(self.request_data)
+        result = await self.controller.clear_history(
+            response=response, namespace=self.namespace
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertEqual(
+            result, Answer(status=Status.success, message="History cleared.")
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_history_manager.py b/tests/test_history_manager.py
new file mode 100644
index 0000000..cee1836
--- /dev/null
+++ b/tests/test_history_manager.py
@@ -0,0 +1,86 @@
+import unittest
+from manager.history import History
+from schema.methods import Methods
+from typing import Any
+
+class TestHistoryManager(unittest.TestCase):
+    def setUp(self):
+        self.namespace = "test"
+        self.request_data: dict[Any, Any] = {
+            "data": {},
+            "method": Methods.GET,
+            "url": "https://example.com",
+            "headers": {"Content-Type": "application/json"},
+            "time": "2024-01-01 12:00:00",
+        }
+        self.history = History(namespace=self.namespace)
+
+    def tearDown(self):
+        self.history.clear()
+
+    def test_load_empty_history(self):
+        self.history.load()
+        self.assertEqual(self.history.data, [])
+
+    def test_save_and_load_history(self):
+        self.history.add(self.request_data)
+        self.history.save()
+        self.history.load()
+        self.assertEqual(self.history.data, [self.request_data])
+
+    def test_clear_history(self):
+        self.history.add(self.request_data)
+        self.history.clear()
+        self.assertEqual(self.history.data, [])
+
+    def test_get_existing_request(self):
+        self.history.add(self.request_data)
+        result = self.history.get(0)
+        self.assertEqual(result, self.request_data)
+
+    def test_get_non_existing_request(self):
+        result = self.history.get(0)
+        self.assertIsNone(result)
+
+    def test_get_request_with_index_out_of_range(self):
+        self.history.add(self.request_data)
+        result = self.history.get(1)
+        self.assertIsNone(result)
+
+    def test_last_existing_request(self):
+        self.history.add(self.request_data)
+        result = self.history.last()
+        self.assertEqual(result, self.request_data)
+
+    def test_last_non_existing_request(self):
+        result = self.history.last()
+        self.assertIsNone(result)
+
+    def test_last_request_with_limit_reached(self):
+        for i in range(History.HISTORY_LIMIT + 1):
+            self.history.add(self.request_data)
+        result = self.history.last()
+        self.assertEqual(result, self.request_data)
+
+    def test_add_request(self):
+        self.history.clear()
+        self.history.add(self.request_data)
+        self.assertEqual(self.history.data, [self.request_data])
+
+    def test_add_request_with_limit_reached(self):
+        for i in range(History.HISTORY_LIMIT + 1):
+            self.history.add(self.request_data)
+        self.assertEqual(len(self.history.data), History.HISTORY_LIMIT)
+
+    def test_all_requests(self):
+        for i in range(History.HISTORY_LIMIT):
+            self.history.add(self.request_data)
+        result = self.history.all()
+        self.assertEqual(result, [self.request_data for i in range(History.HISTORY_LIMIT)])
+
+    def test_all_requests_empty(self):
+        result = self.history.all()
+        self.assertIsNone(result)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_request_data_schema.py b/tests/test_request_data_schema.py
new file mode 100644
index 0000000..14f3d1d
--- /dev/null
+++ b/tests/test_request_data_schema.py
@@ -0,0 +1,22 @@
+import unittest
+from schema.request_data import RequestData
+from schema.methods import Methods
+
+
+class TestRequestDataSchema(unittest.TestCase):
+    def test_request_data_creation(self):
+        data = {"key": "value"}
+        method = Methods.GET
+        url = "https://example.com"
+        headers = {"Content-Type": "application/json"}
+        time = "2022-01-01 12:00:00"
+        request_data = RequestData(data=data, method=method, url=url, headers=headers, time=time)
+        self.assertEqual(request_data.data, data)
+        self.assertEqual(request_data.method, method)
+        self.assertEqual(request_data.url, url)
+        self.assertEqual(request_data.headers, headers)
+        self.assertEqual(request_data.time, time)
+
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file