diff --git a/api_server/services/file_service.py b/api_server/services/file_service.py
index 394571084e9..115edccd30b 100644
--- a/api_server/services/file_service.py
+++ b/api_server/services/file_service.py
@@ -10,4 +10,4 @@ def list_files(self, directory_key: str) -> List[FileSystemItem]:
         if directory_key not in self.allowed_directories:
             raise ValueError("Invalid directory key")
         directory_path: str = self.allowed_directories[directory_key]
-        return self.file_system_ops.walk_directory(directory_path)
\ No newline at end of file
+        return self.file_system_ops.walk_directory(directory_path)
diff --git a/api_server/utils/file_operations.py b/api_server/utils/file_operations.py
index ef1bf999e52..32d6e047a5d 100644
--- a/api_server/utils/file_operations.py
+++ b/api_server/utils/file_operations.py
@@ -39,4 +39,4 @@ def walk_directory(directory: str) -> List[FileSystemItem]:
                     "path": relative_path,
                     "type": "directory"
                 })
-        return file_list
\ No newline at end of file
+        return file_list
diff --git a/tests-unit/server/routes/internal_routes_test.py b/tests-unit/server/routes/internal_routes_test.py
index 2d2b43bd66f..552aba17495 100644
--- a/tests-unit/server/routes/internal_routes_test.py
+++ b/tests-unit/server/routes/internal_routes_test.py
@@ -112,4 +112,4 @@ async def test_file_service_initialization():
         })
 
         # Verify that the file_service attribute of InternalRoutes is set
-        assert internal_routes.file_service == mock_file_service_instance
\ No newline at end of file
+        assert internal_routes.file_service == mock_file_service_instance
diff --git a/tests-unit/server/services/file_service_test.py b/tests-unit/server/services/file_service_test.py
index 5650452a32f..37cd18324c4 100644
--- a/tests-unit/server/services/file_service_test.py
+++ b/tests-unit/server/services/file_service_test.py
@@ -51,4 +51,4 @@ def test_list_files_all_allowed_directories(file_service, mock_file_system_ops,
     
     assert len(result) == 1
     assert result[0]["name"] == f"file_{directory_key}.txt"
-    mock_file_system_ops.walk_directory.assert_called_once_with(f"/path/to/{directory_key}")
\ No newline at end of file
+    mock_file_system_ops.walk_directory.assert_called_once_with(f"/path/to/{directory_key}")