diff --git a/Lib/test/support/interpreters.py b/Lib/test/support/interpreters.py
index eeff3abe032..5c484d1170d 100644
--- a/Lib/test/support/interpreters.py
+++ b/Lib/test/support/interpreters.py
@@ -5,7 +5,7 @@ import _xxsubinterpreters as _interpreters
 import _xxinterpchannels as _channels
 
 # aliases:
-from _xxsubinterpreters import is_shareable
+from _xxsubinterpreters import is_shareable, RunFailedError
 from _xxinterpchannels import (
     ChannelError, ChannelNotFoundError, ChannelEmptyError,
 )