Merge pull request #13671 from AspirinSJL/grpclb_reresolution

grpclb re-resolution
diff --git a/src/python/grpcio_tests/tests/unit/_reconnect_test.py b/src/python/grpcio_tests/tests/unit/_reconnect_test.py
index 10aee9f..8acba5a 100644
--- a/src/python/grpcio_tests/tests/unit/_reconnect_test.py
+++ b/src/python/grpcio_tests/tests/unit/_reconnect_test.py
@@ -14,6 +14,7 @@
 """Tests that a channel will reconnect if a connection is dropped"""
 
 import socket
+import time
 import unittest
 
 import grpc
@@ -88,6 +89,7 @@
         multi_callable = channel.unary_unary(_UNARY_UNARY)
         self.assertEqual(_RESPONSE, multi_callable(_REQUEST))
         server.stop(None)
+        time.sleep(1)
         server = grpc.server(server_pool, (handler,))
         server.add_insecure_port('[::]:{}'.format(port))
         server.start()