diff --git a/pre_commit_hooks/check_added_large_files.py b/pre_commit_hooks/check_added_large_files.py
index 3a53fe3..03e88b8 100644
--- a/pre_commit_hooks/check_added_large_files.py
+++ b/pre_commit_hooks/check_added_large_files.py
@@ -23,7 +23,7 @@
         (line[:3].strip(), line[3:].rpartition(' ')[0]) for line in lines
     ]
 
-    def to_file_part(mode, filepart):
+    def to_file_part(mode, filepart):  # pragma: no cover (no git-lfs)
         assert mode in ('A', 'R')
         return filepart if mode == 'A' else filepart.split(' -> ')[1]