diff --git a/tests/daemon/face/tcp-channel-fixture.hpp b/tests/daemon/face/tcp-channel-fixture.hpp
index b6eb99c..557eeb8 100644
--- a/tests/daemon/face/tcp-channel-fixture.hpp
+++ b/tests/daemon/face/tcp-channel-fixture.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California,
+ * Copyright (c) 2014-2023,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -31,6 +31,8 @@
 
 #include "channel-fixture.hpp"
 
+#include <boost/asio/defer.hpp>
+
 namespace nfd::tests {
 
 using face::TcpChannel;
@@ -57,7 +59,7 @@
   void
   connect(TcpChannel& channel) final
   {
-    g_io.post([&] {
+    boost::asio::defer(g_io, [&] {
       channel.connect(listenerEp, {},
         [this] (const shared_ptr<Face>& newFace) {
           BOOST_REQUIRE(newFace != nullptr);
diff --git a/tests/daemon/face/udp-channel-fixture.hpp b/tests/daemon/face/udp-channel-fixture.hpp
index a314a8c..63caf9a 100644
--- a/tests/daemon/face/udp-channel-fixture.hpp
+++ b/tests/daemon/face/udp-channel-fixture.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California,
+ * Copyright (c) 2014-2023,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -31,6 +31,8 @@
 
 #include "channel-fixture.hpp"
 
+#include <boost/asio/defer.hpp>
+
 namespace nfd::tests {
 
 using face::UdpChannel;
@@ -52,7 +54,7 @@
   void
   connect(UdpChannel& channel) final
   {
-    g_io.post([&] {
+    boost::asio::defer(g_io, [&] {
       channel.connect(listenerEp, {},
         [this] (const shared_ptr<Face>& newFace) {
           BOOST_REQUIRE(newFace != nullptr);
diff --git a/tests/daemon/mgmt/rib-manager.t.cpp b/tests/daemon/mgmt/rib-manager.t.cpp
index 8ae96ae..0b407f6 100644
--- a/tests/daemon/mgmt/rib-manager.t.cpp
+++ b/tests/daemon/mgmt/rib-manager.t.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2022,  Regents of the University of California,
+ * Copyright (c) 2014-2023,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -185,7 +185,7 @@
       data->setContent(resp.wireEncode());
       m_keyChain.sign(*data, ndn::security::SigningInfo(ndn::security::SigningInfo::SIGNER_TYPE_SHA256));
 
-      m_face.getIoService().post([this, data] { m_face.receive(*data); });
+      boost::asio::post(m_face.getIoService(), [this, data] { m_face.receive(*data); });
     };
 
     const Name commandPrefix("/localhost/nfd/fib/add-nexthop");
diff --git a/tests/daemon/rib/fib-updates-common.hpp b/tests/daemon/rib/fib-updates-common.hpp
index 33b549d..15e623f 100644
--- a/tests/daemon/rib/fib-updates-common.hpp
+++ b/tests/daemon/rib/fib-updates-common.hpp
@@ -33,6 +33,8 @@
 #include "tests/daemon/global-io-fixture.hpp"
 #include "tests/daemon/rib/create-route.hpp"
 
+#include <boost/asio/defer.hpp>
+
 #include <ndn-cxx/util/dummy-client-face.hpp>
 
 namespace nfd::tests {
@@ -80,7 +82,7 @@
              uint32_t nTimeouts)
   {
     updates.push_back(update);
-    getGlobalIoService().post([=] {
+    boost::asio::defer(getGlobalIoService(), [=] {
       if (mockSuccess) {
         onUpdateSuccess(update, onSuccess, onFailure);
       }
diff --git a/tests/tools/mock-nfd-mgmt-fixture.hpp b/tests/tools/mock-nfd-mgmt-fixture.hpp
index ede5568..eed9846 100644
--- a/tests/tools/mock-nfd-mgmt-fixture.hpp
+++ b/tests/tools/mock-nfd-mgmt-fixture.hpp
@@ -34,6 +34,7 @@
 #include <ndn-cxx/mgmt/nfd/control-response.hpp>
 #include <ndn-cxx/util/dummy-client-face.hpp>
 
+#include <boost/asio/defer.hpp>
 #include <boost/concept/assert.hpp>
 
 namespace nfd::tests {
@@ -52,7 +53,7 @@
   {
     face.onSendInterest.connect([this] (const Interest& interest) {
       if (processInterest) {
-        m_io.post([=] { processInterest(interest); });
+        boost::asio::defer(m_io, [=] { processInterest(interest); });
       }
     });
   }