Issue #18200: Update the stdlib (except tests) to use
ModuleNotFoundError.
diff --git a/Lib/importlib/abc.py b/Lib/importlib/abc.py
index 417fe41..cf20e9f 100644
--- a/Lib/importlib/abc.py
+++ b/Lib/importlib/abc.py
@@ -3,7 +3,7 @@
 from . import machinery
 try:
     import _frozen_importlib
-except ImportError as exc:
+except ModuleNotFoundError as exc:
     if exc.name != '_frozen_importlib':
         raise
     _frozen_importlib = None