diff --git a/Lib/test/test_concurrent_futures.py b/Lib/test/test_concurrent_futures.py
index 6f3b4609232bbb..f0473495fdc655 100644
--- a/Lib/test/test_concurrent_futures.py
+++ b/Lib/test/test_concurrent_futures.py
@@ -484,7 +484,7 @@ def test_cancel_futures_wait_false(self):
                 t = ThreadPoolExecutor()
                 t.submit(sleep_and_print, .1, "apple")
                 t.shutdown(wait=False, cancel_futures=True)
-            """.format(executor_type=self.executor_type.__name__))
+            """)
         # Errors in atexit hooks don't change the process exit code, check
         # stderr manually.
         self.assertFalse(err)