diff --git a/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py b/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
index d94494e219c5f348a08b4c3c2d111674ea6badf3..abc30874f617463d0cf2402786ccabf18e1348e0 100644
--- a/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
+++ b/python/paddle/fluid/tests/unittests/test_py_reader_using_executor.py
@@ -209,6 +209,7 @@ class TestPyReaderUsingExecutor(unittest.TestCase):
             else:
                 thread = threading.Thread(
                     target=feed_data, args=(feed_queue, reader))
+                thread.daemon = True
                 thread.start()
 
             self.outputs = []