# HG changeset patch
# Parent 6d278f426417063b12703f980cb17411849b6326

diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -115,7 +115,8 @@
             code = sys.exc_info()[1].code
             stdout = sys.stdout.getvalue()
             stderr = sys.stderr.getvalue()
-            raise ArgumentParserError("SystemExit", stdout, stderr, code)
+            raise ArgumentParserError(
+                "SystemExit", stdout, stderr, code) from None
     finally:
         sys.stdout = old_stdout
         sys.stderr = old_stderr