diff --git a/oslo_messaging/tests/drivers/test_impl_rabbit.py b/oslo_messaging/tests/drivers/test_impl_rabbit.py
index 857499fb5..4632d4d59 100644
--- a/oslo_messaging/tests/drivers/test_impl_rabbit.py
+++ b/oslo_messaging/tests/drivers/test_impl_rabbit.py
@@ -403,11 +403,6 @@ class TestSendReceive(test_utils.BaseTestCase):
         ('zero', dict(rx_id=False, reply=0)),
     ]
 
-    _reply_fail = [
-        ('reply_success', dict(reply_failure_404=False)),
-        ('reply_failure', dict(reply_failure_404=True)),
-    ]
-
     _failure = [
         ('success', dict(failure=False)),
         ('failure', dict(failure=True, expected=False)),
@@ -424,7 +419,6 @@ class TestSendReceive(test_utils.BaseTestCase):
         cls.scenarios = testscenarios.multiply_scenarios(cls._n_senders,
                                                          cls._context,
                                                          cls._reply,
-                                                         cls._reply_fail,
                                                          cls._failure,
                                                          cls._timeout)
 
@@ -457,10 +451,8 @@ class TestSendReceive(test_utils.BaseTestCase):
 
         def send_and_wait_for_reply(i):
             try:
-                if self.reply_failure_404:
-                    timeout = 0.01
-                else:
-                    timeout = self.timeout
+
+                timeout = self.timeout
                 replies.append(driver.send(target,
                                            self.ctxt,
                                            {'tx_id': i},
@@ -470,8 +462,7 @@ class TestSendReceive(test_utils.BaseTestCase):
                 self.assertIsNone(self.timeout)
             except (ZeroDivisionError, oslo_messaging.MessagingTimeout) as e:
                 replies.append(e)
-                self.assertTrue(self.failure or self.timeout is not None
-                                or self.reply_failure_404)
+                self.assertTrue(self.failure or self.timeout is not None)
 
         while len(senders) < self.n_senders:
             senders.append(threading.Thread(target=send_and_wait_for_reply,
@@ -491,18 +482,6 @@ class TestSendReceive(test_utils.BaseTestCase):
         if len(order) > 1:
             order[-1], order[-2] = order[-2], order[-1]
 
-        if self.reply_failure_404:
-            start = time.time()
-            # NOTE(sileht): Simulate a rpc client restart
-            # By returning a ExchangeNotFound when we try to
-            # send reply
-            exc = (driver._reply_q_conn.connection.
-                   connection.channel_errors[0]())
-            exc.code = 404
-            self.useFixture(mockpatch.Patch(
-                'kombu.messaging.Producer.publish',
-                side_effect=exc))
-
         for i in order:
             if self.timeout is None:
                 if self.failure:
@@ -516,22 +495,11 @@ class TestSendReceive(test_utils.BaseTestCase):
                     msgs[i].reply({'rx_id': i})
                 else:
                     msgs[i].reply(self.reply)
-            elif self.reply_failure_404:
-                msgs[i].reply({})
             senders[i].join()
 
-        if self.reply_failure_404:
-            # NOTE(sileht) all reply fail, first take
-            # kombu_missing_consumer_retry_timeout seconds to fail
-            # next immediately fail
-            dt = time.time() - start
-            rabbit_conf = self.conf.oslo_messaging_rabbit
-            timeout = rabbit_conf.kombu_missing_consumer_retry_timeout
-            self.assertTrue(timeout <= dt < (timeout + 0.100), dt)
-
         self.assertEqual(len(senders), len(replies))
         for i, reply in enumerate(replies):
-            if self.timeout is not None or self.reply_failure_404:
+            if self.timeout is not None:
                 self.assertIsInstance(reply, oslo_messaging.MessagingTimeout)
             elif self.failure:
                 self.assertIsInstance(reply, ZeroDivisionError)