diff --git a/tests/scripts/thread-cert/test_mle_msg_key_seq_jump.py b/tests/scripts/thread-cert/test_mle_msg_key_seq_jump.py
index 246343421..4113c4285 100755
--- a/tests/scripts/thread-cert/test_mle_msg_key_seq_jump.py
+++ b/tests/scripts/thread-cert/test_mle_msg_key_seq_jump.py
@@ -256,7 +256,7 @@ class MleMsgKeySeqJump(thread_cert.TestCase):
         self.assertEqual(child.get_key_sequence_counter(), 25)
 
         child.start()
-        self.simulator.go(2)
+        self.simulator.go(5)
 
         self.assertEqual(child.get_state(), 'child')
         self.assertEqual(leader.get_key_sequence_counter(), 25)