diff --git a/Lib/unittest.py b/Lib/unittest.py
index 06aee9a4613..d305d954b31 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -504,7 +504,7 @@ class TestLoader:
                 except ImportError:
                     del parts_copy[-1]
                     if not parts_copy: raise
-                parts = parts[1:]
+            parts = parts[1:]
         obj = module
         for part in parts:
             parent, obj = obj, getattr(obj, part)