diff --git a/testing/test_runner.py b/testing/test_runner.py
index 8cc496f70..1f05beb39 100644
--- a/testing/test_runner.py
+++ b/testing/test_runner.py
@@ -408,7 +408,7 @@ class BaseFunctionalTests:
         # assert rep.outcome.when == "setup"
         # assert rep.outcome.where.lineno == 3
         # assert rep.outcome.where.path.basename == "test_func.py"
-        # assert instanace(rep.failed.failurerepr, PythonFailureRepr)
+        # assert isinstance(rep.failed.failurerepr, PythonFailureRepr)
 
     def test_systemexit_does_not_bail_out(self, pytester: Pytester) -> None:
         try: