1 files changed, 9 insertions, 1 deletions
diff --git a/Lib/test/test_concurrent_futures.py b/Lib/test/test_concurrent_futures.py
index 2662af7..ec84a66 100644
--- a/Lib/test/test_concurrent_futures.py
+++ b/Lib/test/test_concurrent_futures.py
@@ -369,7 +369,15 @@ class ExecutorTest(unittest.TestCase):
 
 
 class ThreadPoolExecutorTest(ThreadPoolMixin, ExecutorTest):
-    pass
+    def test_map_submits_without_iteration(self):
+        """Tests verifying issue 11777."""
+        finished = []
+        def record_finished(n):
+            finished.append(n)
+
+        self.executor.map(record_finished, range(10))
+        self.executor.shutdown(wait=True)
+        self.assertCountEqual(finished, range(10))
 
 
 class ProcessPoolExecutorTest(ProcessPoolMixin, ExecutorTest):