name2ft renamed in 3.13

IPython/testing/ipunittest.py

@@ -36,6 +36,7 b' Authors'
 
 # Stdlib
 import re
+import sys
 import unittest
 from doctest import DocTestFinder, DocTestRunner, TestResults
 from IPython.terminal.interactiveshell import InteractiveShell
@@ -49,7 +50,10 b' def count_failures(runner):'
 
     Code modeled after the summarize() method in doctest.
     """
-    return [TestResults(f, t) for f, t in runner._name2ft.values() if f > 0 ]
+    if sys.version_info < (3, 13):
+        return [TestResults(f, t) for f, t in runner._name2ft.values() if f > 0]
+    else:
+        return [TestResults(f, t) for f, t in runner._stats.values() if f > 0]
 
 
 class IPython2PythonConverter(object):