diff --git a/model_filemanager/download_models.py b/model_filemanager/download_models.py
index 5173a2a6..ed0c5a52 100644
--- a/model_filemanager/download_models.py
+++ b/model_filemanager/download_models.py
@@ -112,7 +112,7 @@ async def track_download_progress(response: aiohttp.ClientResponse, file_path: s
 
         await update_progress()
         
-        logging.info(f"Download completed. Total downloaded: {downloaded}")
+        logging.info(f"Successfully downloaded {model_name}. Total downloaded: {downloaded}")
         status = DownloadStatus(DownloadStatusType.COMPLETED, 100, f"Successfully downloaded {model_name}")
         await progress_callback(relative_path, status)
 
diff --git a/tests-unit/prompt_server_test/download_models_test.py b/tests-unit/prompt_server_test/download_models_test.py
index 9f0ac45b..26142289 100644
--- a/tests-unit/prompt_server_test/download_models_test.py
+++ b/tests-unit/prompt_server_test/download_models_test.py
@@ -7,38 +7,51 @@ from unittest.mock import AsyncMock, patch, MagicMock
 from model_filemanager import download_model, track_download_progress, create_model_path, check_file_exists, DownloadStatus, DownloadModelResult, DownloadStatusType
 
 class AsyncIteratorMock:
+    """
+    A mock class that simulates an asynchronous iterator.
+    This is used to mimic the behavior of aiohttp's content iterator.
+    """
     def __init__(self, seq):
+        # Convert the input sequence into an iterator
         self.iter = iter(seq)
 
     def __aiter__(self):
+        # This method is called when 'async for' is used
         return self
 
     async def __anext__(self):
+        # This method is called for each iteration in an 'async for' loop
         try:
             return next(self.iter)
         except StopIteration:
+            # This is the asynchronous equivalent of StopIteration
             raise StopAsyncIteration
 
 class ContentMock:
+    """
+    A mock class that simulates the content attribute of an aiohttp ClientResponse.
+    This class provides the iter_chunked method which returns an async iterator of chunks.
+    """
     def __init__(self, chunks):
+        # Store the chunks that will be returned by the iterator
         self.chunks = chunks
 
     def iter_chunked(self, chunk_size):
+        # This method mimics aiohttp's content.iter_chunked()
+        # For simplicity in testing, we ignore chunk_size and just return our predefined chunks
         return AsyncIteratorMock(self.chunks)
 
 @pytest.mark.asyncio
 async def test_download_model_success():
-    # Mock dependencies
     mock_response = AsyncMock(spec=aiohttp.ClientResponse)
     mock_response.status = 200
     mock_response.headers = {'Content-Length': '1000'}
-    
     # Create a mock for content that returns an async iterator directly
     chunks = [b'a' * 500, b'b' * 300, b'c' * 200]
     mock_response.content = ContentMock(chunks)
 
     mock_make_request = AsyncMock(return_value=mock_response)
-    mock_progress_callback = MagicMock()
+    mock_progress_callback = AsyncMock()
 
     # Mock file operations
     mock_open = MagicMock()