diff --git a/tests/integrated/network-monitor.cpp b/tests/integrated/network-monitor.cpp
index 917dcae..eb23e5b 100644
--- a/tests/integrated/network-monitor.cpp
+++ b/tests/integrated/network-monitor.cpp
@@ -43,7 +43,7 @@
 BOOST_AUTO_TEST_SUITE(TestNetworkMonitor)
 
 static std::ostream&
-logEvent(const shared_ptr<NetworkInterface>& ni = nullptr, std::ostream& os = std::cout)
+logEvent(const shared_ptr<const NetworkInterface>& ni = nullptr, std::ostream& os = std::cout)
 {
   os << '[' << time::toIsoString(time::system_clock::now()) << "] ";
   if (ni != nullptr)
@@ -69,13 +69,13 @@
     }
   });
 
-  monitor.onInterfaceAdded.connect([] (const shared_ptr<NetworkInterface>& ni) {
+  monitor.onInterfaceAdded.connect([] (const shared_ptr<const NetworkInterface>& ni) {
     logEvent(ni) << "onInterfaceAdded\n" << *ni;
     logEvent(ni) << "link-type: " << detail::getLinkType(ni->getName()) << "\n";
 
     ni->onAddressAdded.connect([ni] (const NetworkAddress& address) {
       logEvent(ni) << "onAddressAdded " << address << std::endl;
-      });
+    });
 
     ni->onAddressRemoved.connect([ni] (const NetworkAddress& address) {
       logEvent(ni) << "onAddressRemoved " << address << std::endl;
@@ -91,7 +91,7 @@
     });
   }); // monitor.onInterfaceAdded.connect
 
-  monitor.onInterfaceRemoved.connect([] (const shared_ptr<NetworkInterface>& ni) {
+  monitor.onInterfaceRemoved.connect([] (const shared_ptr<const NetworkInterface>& ni) {
     logEvent(ni) << "onInterfaceRemoved" << std::endl;
   });
 
diff --git a/tests/unit-tests/net/network-monitor-stub.t.cpp b/tests/unit-tests/net/network-monitor-stub.t.cpp
new file mode 100644
index 0000000..03a1dc0
--- /dev/null
+++ b/tests/unit-tests/net/network-monitor-stub.t.cpp
@@ -0,0 +1,125 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "net/network-monitor-stub.hpp"
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace net {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(Net)
+BOOST_AUTO_TEST_SUITE(TestNetworkMonitorStub)
+
+BOOST_AUTO_TEST_CASE(Capabilities)
+{
+  NetworkMonitorStub stub(NetworkMonitor::CAP_ENUM | NetworkMonitor::CAP_IF_ADD_REMOVE);
+  BOOST_CHECK_EQUAL(stub.getCapabilities(),
+                    NetworkMonitor::CAP_ENUM | NetworkMonitor::CAP_IF_ADD_REMOVE);
+}
+
+class StubFixture
+{
+public:
+  StubFixture()
+    : stub(~0)
+  {
+    stub.onEnumerationCompleted.connect([this] { signals.push_back("EnumerationCompleted"); });
+    stub.onInterfaceAdded.connect([this] (shared_ptr<const NetworkInterface> netif) {
+      signals.push_back("InterfaceAdded " + netif->getName()); });
+    stub.onInterfaceRemoved.connect([this] (shared_ptr<const NetworkInterface> netif) {
+      signals.push_back("InterfaceRemoved " + netif->getName()); });
+  }
+
+public:
+  NetworkMonitorStub stub;
+  std::vector<std::string> signals;
+};
+
+BOOST_FIXTURE_TEST_CASE(AddInterface, StubFixture)
+{
+  BOOST_CHECK_EQUAL(stub.listNetworkInterfaces().size(), 0);
+  BOOST_CHECK(stub.getNetworkInterface("eth1") == nullptr);
+
+  shared_ptr<NetworkInterface> if1 = stub.makeNetworkInterface();
+  if1->setIndex(13697);
+  if1->setName("eth1");
+  stub.addInterface(if1);
+  if1.reset();
+  BOOST_REQUIRE(stub.getNetworkInterface("eth1") != nullptr);
+  BOOST_CHECK_EQUAL(stub.getNetworkInterface("eth1")->getIndex(), 13697);
+  BOOST_CHECK_EQUAL(stub.listNetworkInterfaces().at(0)->getIndex(), 13697);
+  BOOST_REQUIRE_EQUAL(signals.size(), 1);
+  BOOST_CHECK_EQUAL(signals.back(), "InterfaceAdded eth1");
+
+  shared_ptr<NetworkInterface> if1b = stub.makeNetworkInterface();
+  if1b->setIndex(3280);
+  if1b->setName("eth1");
+  BOOST_CHECK_THROW(stub.addInterface(if1b), std::invalid_argument);
+  BOOST_CHECK(stub.getNetworkInterface("eth1") != nullptr);
+  BOOST_CHECK_EQUAL(stub.getNetworkInterface("eth1")->getIndex(), 13697);
+  BOOST_CHECK_EQUAL(stub.listNetworkInterfaces().at(0)->getIndex(), 13697);
+  BOOST_CHECK_EQUAL(signals.size(), 1);
+
+  stub.emitEnumerationCompleted();
+  BOOST_REQUIRE_EQUAL(signals.size(), 2);
+  BOOST_CHECK_EQUAL(signals.back(), "EnumerationCompleted");
+
+  shared_ptr<NetworkInterface> if2 = stub.makeNetworkInterface();
+  if2->setIndex(19243);
+  if2->setName("eth2");
+  stub.addInterface(if2);
+  if2.reset();
+  BOOST_REQUIRE(stub.getNetworkInterface("eth2") != nullptr);
+  BOOST_CHECK_EQUAL(stub.getNetworkInterface("eth2")->getIndex(), 19243);
+  BOOST_CHECK_EQUAL(stub.listNetworkInterfaces().size(), 2);
+  BOOST_REQUIRE_EQUAL(signals.size(), 3);
+  BOOST_CHECK_EQUAL(signals.back(), "InterfaceAdded eth2");
+}
+
+BOOST_FIXTURE_TEST_CASE(RemoveInterface, StubFixture)
+{
+  shared_ptr<NetworkInterface> if1 = stub.makeNetworkInterface();
+  if1->setIndex(13697);
+  if1->setName("eth1");
+  stub.addInterface(if1);
+
+  stub.emitEnumerationCompleted();
+  BOOST_REQUIRE_EQUAL(signals.size(), 2);
+  BOOST_CHECK_EQUAL(signals.back(), "EnumerationCompleted");
+
+  stub.removeInterface("eth1");
+  BOOST_CHECK(stub.getNetworkInterface("eth1") == nullptr);
+  BOOST_CHECK_EQUAL(stub.listNetworkInterfaces().size(), 0);
+  BOOST_REQUIRE_EQUAL(signals.size(), 3);
+  BOOST_CHECK_EQUAL(signals.back(), "InterfaceRemoved eth1");
+
+  stub.removeInterface("eth2"); // non-existent
+  BOOST_CHECK_EQUAL(signals.size(), 3);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // TestNetworkMonitorStub
+BOOST_AUTO_TEST_SUITE_END() // Net
+
+} // namespace tests
+} // namespace net
+} // namespace ndn
diff --git a/tests/unit-tests/net/network-monitor.t.cpp b/tests/unit-tests/net/network-monitor.t.cpp
index d23cb38..e46075b 100644
--- a/tests/unit-tests/net/network-monitor.t.cpp
+++ b/tests/unit-tests/net/network-monitor.t.cpp
@@ -53,7 +53,7 @@
   auto nm = make_unique<NetworkMonitor>(io);
   NM_REQUIRE_CAP(ENUM);
 
-  nm->onInterfaceAdded.connect([&] (const shared_ptr<NetworkInterface>&) {
+  nm->onInterfaceAdded.connect([&] (const shared_ptr<const NetworkInterface>&) {
     io.post([&] { nm.reset(); });
   });
   nm->onEnumerationCompleted.connect([&] {