diff --git a/core/network-interface.cpp b/core/network-interface.cpp
index d7eebbd..1aad63e 100644
--- a/core/network-interface.cpp
+++ b/core/network-interface.cpp
@@ -54,9 +54,25 @@
               "NetworkInterfaceInfo must provide a default constructor");
 #endif
 
+#ifdef WITH_TESTS
+static shared_ptr<std::vector<NetworkInterfaceInfo>> s_debugNetworkInterfaces = nullptr;
+
+void
+setDebugNetworkInterfaces(shared_ptr<std::vector<NetworkInterfaceInfo>> interfaces)
+{
+  s_debugNetworkInterfaces = interfaces;
+}
+#endif
+
 std::vector<NetworkInterfaceInfo>
 listNetworkInterfaces()
 {
+#ifdef WITH_TESTS
+  if (s_debugNetworkInterfaces != nullptr) {
+    return *s_debugNetworkInterfaces;
+  }
+#endif
+
   using namespace boost::asio::ip;
   using std::strerror;
 
diff --git a/core/network-interface.hpp b/core/network-interface.hpp
index 8519db1..e9be083 100644
--- a/core/network-interface.hpp
+++ b/core/network-interface.hpp
@@ -88,9 +88,19 @@
   return (flags & IFF_UP) != 0;
 }
 
+/** \brief List configured network interfaces on the system and their info
+ */
 std::vector<NetworkInterfaceInfo>
 listNetworkInterfaces();
 
+#ifdef WITH_TESTS
+/** \brief Set a list of network interfaces to be returned by subsequent listNetworkInterfaces call
+ *  \note To reset to normal behavior, use `setDebugNetworkInterfaces(nullptr);`
+ */
+void
+setDebugNetworkInterfaces(shared_ptr<std::vector<NetworkInterfaceInfo>> interfaces);
+#endif
+
 } // namespace nfd
 
 #endif // NFD_CORE_NETWORK_INTERFACE_HPP