diff --git a/mopidy/file/library.py b/mopidy/file/library.py
index dbf7fb4e..6a2db5f9 100644
--- a/mopidy/file/library.py
+++ b/mopidy/file/library.py
@@ -36,9 +36,11 @@ class FileLibraryProvider(backend.LibraryProvider):
         self._media_dirs = list(self._get_media_dirs(config))
         self._follow_symlinks = config['file']['follow_symlinks']
         self._show_dotfiles = config['file']['show_dotfiles']
-        self._excluded_file_extensions = config['file']['excluded_file_extensions']
+        self._excluded_file_extensions = \
+            config['file']['excluded_file_extensions']
         self._excluded_file_extensions = tuple(
-            bytes(file_ext.lower()) for file_ext in self._excluded_file_extensions)
+            bytes(file_ext.lower()) for file_ext in
+            self._excluded_file_extensions)
 
         self._scanner = scan.Scanner(
             timeout=config['file']['metadata_timeout'])
@@ -64,7 +66,8 @@ class FileLibraryProvider(backend.LibraryProvider):
             if not self._show_dotfiles and dir_entry.startswith(b'.'):
                 continue
 
-            if self._excluded_file_extensions and dir_entry.endswith(self._excluded_file_extensions):
+            if self._excluded_file_extensions and \
+                    dir_entry.endswith(self._excluded_file_extensions):
                 continue
 
             if os.path.islink(child_path) and not self._follow_symlinks: