diff --git a/testing/code/test_excinfo.py b/testing/code/test_excinfo.py
index 8cf79166b..5c47feed6 100644
--- a/testing/code/test_excinfo.py
+++ b/testing/code/test_excinfo.py
@@ -168,8 +168,8 @@ class TestTraceback_f_g_h:
         excinfo = pytest.raises(ValueError, h)
         traceback = excinfo.traceback
         ntraceback = traceback.filter()
-        print('old: {!r}'.format(traceback))
-        print('new: {!r}'.format(ntraceback))
+        print('old: {0!r}'.format(traceback))
+        print('new: {0!r}'.format(ntraceback))
 
         if matching:
             assert len(ntraceback) == len(traceback) - 2