diff --git a/beets/importer/tasks.py b/beets/importer/tasks.py
index 506785e80..7164448bd 100644
--- a/beets/importer/tasks.py
+++ b/beets/importer/tasks.py
@@ -1170,20 +1170,20 @@ class ImportTaskFactory:
             "8svx",
             "cda",
         ]
-        format = ""
+        detected_format = ""
         # The first format from ffprobe that is on this list is taken
         for f in formats:
             if f in wiki_formats:
-                format = f
+                detected_format = f
                 break
 
         # if ffprobe can't find a format, the file is prob not music
-        if format == "":
+        if detected_format == "":
             return path
 
         # cp and add ext. If already exist, use that file
         # assume, for example, the only diff between 'asdf.mp3' and 'asdf' is format
-        new_path = path.with_suffix("." + format)
+        new_path = path.with_suffix("." + detected_format)
         if not new_path.exists():
             util.move(path, new_path)
         else: