diff --git a/src/tests/test_base.py b/src/tests/test_base.py
index 3cd60be..6980fa2 100644
--- a/src/tests/test_base.py
+++ b/src/tests/test_base.py
@@ -108,3 +108,37 @@ def test_prepare_body_form(self):
         # Assert
         self.assertTrue(content_type.startswith("multipart/form-data"))
         self.assertIsInstance(body, bytes)
+
+    def test_prepare_body_file(self):
+        baseClient = BaseClient(TestClientId, TestClientSecret, TestEndpoint)
+        file_content = b"test file content"
+
+        content_type, body = baseClient.prepare_body(file_content, True, True)
+
+        self.assertTrue(content_type.startswith("multipart/form-data"))
+        self.assertIsInstance(body, bytes)
+        self.assertIn(b"test file content", body)
+
+    def test_do_get_bytes_raw_without_check(self):
+        baseClient = BaseClient(TestClientId, TestClientSecret, TestEndpoint)
+        mock_response = b'{"key": "value"}'
+        url = f"{TestEndpoint}/api/test"
+
+        with requests_mock.Mocker() as m:
+            m.get(url, content=mock_response)
+            result = baseClient.do_get_bytes_raw_without_check(url)
+
+        self.assertEqual(result, mock_response)
+
+    def test_do_post_bytes_raw(self):
+        baseClient = BaseClient(TestClientId, TestClientSecret, TestEndpoint)
+        mock_response = b'{"status": "success"}'
+        url = f"{TestEndpoint}/api/test"
+        content_type = "application/json"
+        body = b'{"test": "data"}'
+
+        with requests_mock.Mocker() as m:
+            m.post(url, content=mock_response)
+            result = baseClient.do_post_bytes_raw(url, content_type, body)
+
+        self.assertEqual(result, mock_response)
diff --git a/src/tests/test_main.py b/src/tests/test_main.py
index d357e2b..db5befb 100644
--- a/src/tests/test_main.py
+++ b/src/tests/test_main.py
@@ -49,3 +49,32 @@ def test_casvisor_sdk_initialization(self):
         self.assertEqual(sdk.organizationName, organization_name)
         self.assertEqual(sdk.applicationName, application_name)
         self.assertIsInstance(sdk.baseClient, BaseClient)
+
+    def test_casvisor_sdk_inheritance(self):
+        sdk = CasvisorSDK(
+            endpoint=TestEndpoint,
+            clientId=TestClientId,
+            clientSecret=TestClientSecret,
+            organizationName=TestOrganization,
+            applicationName=TestApplication,
+        )
+
+        self.assertTrue(hasattr(sdk, "get_records"))
+        self.assertTrue(hasattr(sdk, "get_record"))
+        self.assertTrue(hasattr(sdk, "add_record"))
+        self.assertTrue(hasattr(sdk, "update_record"))
+        self.assertTrue(hasattr(sdk, "delete_record"))
+
+    def test_casvisor_sdk_base_client_initialization(self):
+        sdk = CasvisorSDK(
+            endpoint=TestEndpoint,
+            clientId=TestClientId,
+            clientSecret=TestClientSecret,
+            organizationName=TestOrganization,
+            applicationName=TestApplication,
+        )
+
+        self.assertIsInstance(sdk.baseClient, BaseClient)
+        self.assertEqual(sdk.baseClient.endpoint, TestEndpoint)
+        self.assertEqual(sdk.baseClient.clientId, TestClientId)
+        self.assertEqual(sdk.baseClient.clientSecret, TestClientSecret)