diff --git a/Lib/unittest/loader.py b/Lib/unittest/loader.py
index 8c10ad1..8ee6c56 100644
--- a/Lib/unittest/loader.py
+++ b/Lib/unittest/loader.py
@@ -343,6 +343,8 @@
             return os.path.dirname(full_path)
 
     def _get_name_from_path(self, path):
+        if path == self._top_level_dir:
+            return '.'
         path = _jython_aware_splitext(os.path.normpath(path))
 
         _relpath = os.path.relpath(path, self._top_level_dir)