diff --git a/querent/ingestors/ingestor_manager.py b/querent/ingestors/ingestor_manager.py
index f051e717..fe1d9c71 100644
--- a/querent/ingestors/ingestor_manager.py
+++ b/querent/ingestors/ingestor_manager.py
@@ -1,3 +1,6 @@
+"""
+Ingestor manager, for managing all the factories with backend
+"""
 from typing import Optional
 from querent.config.ingestor_config import IngestorBackend
 from querent.ingestors.base_ingestor import BaseIngestor
@@ -10,10 +13,12 @@
 
 
 class IngestorFactoryManager:
+    """Factory manager"""
+
     def __init__(self):
         self.ingestor_factories = {
             IngestorBackend.PDF.value: PdfIngestorFactory(),
-            IngestorBackend.TEXT.value: TextIngestorFactory()
+            IngestorBackend.TEXT.value: TextIngestorFactory(),
             IngestorBackend.MP3.value: AudioIngestorFactory(),
             IngestorBackend.WAV.value: AudioIngestorFactory(),
             IngestorBackend.JSON.value: JsonIngestorFactory(),
@@ -24,14 +29,17 @@ def __init__(self):
         }
 
     async def get_factory(self, file_extension: str) -> IngestorFactory:
+        """get_factory to match factory based on file extension"""
         return self.ingestor_factories.get(
             file_extension.lower(), UnsupportedIngestor("Unsupported file extension")
         )
 
     async def get_ingestor(self, file_extension: str) -> Optional[BaseIngestor]:
+        """get_ingestor to get factory for that extension"""
         factory = self.get_factory(file_extension)
         return factory.create(file_extension)
 
     async def supports(self, file_extension: str) -> bool:
+        """check if extension supports factory"""
         factory = self.get_factory(file_extension)
         return factory.supports(file_extension)
diff --git a/tests/test_audio_ingestor.py b/tests/test_audio_ingestor.py
index c407fb29..9acb1251 100644
--- a/tests/test_audio_ingestor.py
+++ b/tests/test_audio_ingestor.py
@@ -1,10 +1,12 @@
-import asyncio
+"""Test cases for audio ingestors"""
 from pathlib import Path
+import pytest
+import asyncio
+
 from querent.collectors.fs.fs_collector import FSCollectorFactory
 from querent.config.collector_config import FSCollectorConfig
 from querent.common.uri import Uri
 from querent.ingestors.ingestor_manager import IngestorFactoryManager
-import pytest
 
 
 @pytest.mark.asyncio
@@ -30,7 +32,7 @@ async def poll_and_print():
             if len(ingested) == 0:
                 counter += 1
 
-        assert counter == 0
+    assert counter == 0
 
     await poll_and_print()