From 51df0dff3c4f28016185a9e876ee5b3420712f99 Mon Sep 17 00:00:00 2001
From: Adam Johnson <me@adamj.eu>
Date: Sat, 4 Jan 2025 03:30:40 +0000
Subject: [PATCH] Fixed #36057 -- Enabled test runner to debug chained
 exceptions with `--pdb` on Python 3.13+.

---
 django/test/runner.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/django/test/runner.py b/django/test/runner.py
index a52c52fe21..b83cd37343 100644
--- a/django/test/runner.py
+++ b/django/test/runner.py
@@ -30,7 +30,7 @@ from django.test.utils import setup_test_environment
 from django.test.utils import teardown_databases as _teardown_databases
 from django.test.utils import teardown_test_environment
 from django.utils.datastructures import OrderedSet
-from django.utils.version import PY312
+from django.utils.version import PY312, PY313
 
 try:
     import ipdb as pdb
@@ -126,7 +126,10 @@ class PDBDebugResult(unittest.TextTestResult):
         self.buffer = False
         exc_type, exc_value, traceback = error
         print("\nOpening PDB: %r" % exc_value)
-        pdb.post_mortem(traceback)
+        if PY313:
+            pdb.post_mortem(exc_value)
+        else:
+            pdb.post_mortem(traceback)
 
 
 class DummyList: