diff --git a/Lib/test/libregrtest/setup.py b/Lib/test/libregrtest/setup.py
index 6e05c7e..de52bb5 100644
--- a/Lib/test/libregrtest/setup.py
+++ b/Lib/test/libregrtest/setup.py
@@ -41,8 +41,8 @@
     # the packages to prevent later imports to fail when the CWD is different.
     for module in sys.modules.values():
         if hasattr(module, '__path__'):
-            module.__path__ = [os.path.abspath(path)
-                               for path in module.__path__]
+            for index, path in enumerate(module.__path__):
+                module.__path__[index] = os.path.abspath(path)
         if hasattr(module, '__file__'):
             module.__file__ = os.path.abspath(module.__file__)