diff --git a/quicktex/cli/__init__.py b/quicktex/cli/__init__.py
index fca36d5..84ea843 100644
--- a/quicktex/cli/__init__.py
+++ b/quicktex/cli/__init__.py
@@ -1,17 +1,19 @@
 from PIL import Image
 from typing import List
-import pathlib
 import click
 
 
 def get_decoded_extensions(feature: str = 'open') -> List[str]:
+    """Gets a list of extensions for Pillow formats supporting a supplied feature"""
     extensions = Image.registered_extensions()  # using registered_extensions() triggers lazy loading of format data
     formats = getattr(Image, feature.upper()).keys()
 
     return [ext for ext, fmt in extensions.items() if fmt in formats]
 
 
+# noinspection PyUnusedLocal
 def validate_decoded_extension(ctx, param, value):
+    """Check if an extension for a decoded image is valid"""
     if value[0] != '.':
         value = '.' + value