diff --git a/python/paddle/fluid/tests/unittests/test_imperative_signal_handler.py b/python/paddle/fluid/tests/unittests/test_imperative_signal_handler.py
index b47834ffab85e56b12c787ac57823ee02dd18df7..a0da4b0efee64e6a7aa26a213419764afa90bd22 100644
--- a/python/paddle/fluid/tests/unittests/test_imperative_signal_handler.py
+++ b/python/paddle/fluid/tests/unittests/test_imperative_signal_handler.py
@@ -49,7 +49,7 @@ class TestDygraphDataLoaderSingalHandler(unittest.TestCase):
             test_process.start()
 
             set_child_signal_handler(id(self), test_process.pid)
-            time.sleep(3)
+            time.sleep(5)
         except core.EnforceNotMet as ex:
             self.assertIn("FatalError", cpt.get_exception_message(ex))
             exception = ex