diff --git a/testing/code/test_excinfo.py b/testing/code/test_excinfo.py
index 83ff3d568d1..8ac8a42ab73 100644
--- a/testing/code/test_excinfo.py
+++ b/testing/code/test_excinfo.py
@@ -63,7 +63,7 @@ def test_excinfo_from_exception_simple() -> None:
 
 
 def test_excinfo_from_exception_missing_traceback_assertion() -> None:
-    with pytest.raises(AssertionError, match=r'must have.*__traceback__'):
+    with pytest.raises(AssertionError, match=r"must have.*__traceback__"):
         _pytest._code.ExceptionInfo.from_exception(ValueError())