diff --git a/Modules/REST/test/files.cmake b/Modules/REST/test/files.cmake
index 7299b4bcce..dc836ff9f9 100644
--- a/Modules/REST/test/files.cmake
+++ b/Modules/REST/test/files.cmake
@@ -1,4 +1,6 @@
 set(MODULE_TESTS
+  mitkRESTClientHttpLibTest.cpp
+  mitkRESTServerHttpLibTest.cpp
   mitkRESTClientTest.cpp
   mitkRESTServerTest.cpp
 )
\ No newline at end of file
diff --git a/Modules/REST/test/mitkRESTClientHttpLibTest.cpp b/Modules/REST/test/mitkRESTClientHttpLibTest.cpp
new file mode 100644
index 0000000000..a33b437a7f
--- /dev/null
+++ b/Modules/REST/test/mitkRESTClientHttpLibTest.cpp
@@ -0,0 +1,39 @@
+/*============================================================================
+
+The Medical Imaging Interaction Toolkit (MITK)
+
+Copyright (c) German Cancer Research Center (DKFZ)
+All rights reserved.
+
+Use of this source code is governed by a 3-clause BSD license that can be
+found in the LICENSE file.
+
+============================================================================*/
+
+#include <httplib.h>
+#include <mitkTestFixture.h>
+#include <mitkTestingMacros.h>
+#include <nlohmann/json.hpp>
+
+class mitkRESTClientHttpLibTestSuite : public mitk::TestFixture
+{
+  CPPUNIT_TEST_SUITE(mitkRESTClientHttpLibTestSuite);
+  MITK_TEST(GetRequestValidURI_ReturnsExpectedJSON);
+  CPPUNIT_TEST_SUITE_END();
+
+public:
+  void GetRequestValidURI_ReturnsExpectedJSON()
+  {
+    httplib::Client cli("http://eu.httpbin.org");
+    auto response = cli.Get("/get");
+    if (response->status == 200)
+    {
+      auto js = nlohmann::json::parse(response->body);
+      std::string userAgentWithVersion = js["headers"]["User-Agent"];
+      std::string userAgent = userAgentWithVersion.substr(0, userAgentWithVersion.find("/")); 
+      CPPUNIT_ASSERT_MESSAGE("Result is the expected JSON value", userAgent == "cpp-httplib");
+    }
+  }
+};
+
+MITK_TEST_SUITE_REGISTRATION(mitkRESTClientHttpLib)
diff --git a/Modules/REST/test/mitkRESTServerHttpLibTest.cpp b/Modules/REST/test/mitkRESTServerHttpLibTest.cpp
new file mode 100644
index 0000000000..03c8f4cb6a
--- /dev/null
+++ b/Modules/REST/test/mitkRESTServerHttpLibTest.cpp
@@ -0,0 +1,96 @@
+/*============================================================================
+
+The Medical Imaging Interaction Toolkit (MITK)
+
+Copyright (c) German Cancer Research Center (DKFZ)
+All rights reserved.
+
+Use of this source code is governed by a 3-clause BSD license that can be
+found in the LICENSE file.
+
+============================================================================*/
+
+#include <httplib.h>
+#include <mitkTestFixture.h>
+#include <mitkTestingMacros.h>
+#include <nlohmann/json.hpp>
+#include <future>
+#include <thread>
+#include <map>
+
+
+class mitkRESTServerHttpLibTestSuite : public mitk::TestFixture
+{
+  CPPUNIT_TEST_SUITE(mitkRESTServerHttpLibTestSuite);
+  MITK_TEST(OpenListener_Succeed);
+  MITK_TEST(OpenListenerGetRequestSamePath_ReturnExpectedJSON);
+  CPPUNIT_TEST_SUITE_END();
+
+public:
+  void OpenListener_Succeed()
+  {
+    httplib::Server svr;
+    auto serverlambda = [&]() { svr.listen("localhost", 8080); };
+    svr.Get("/get",
+            [](const httplib::Request &, httplib::Response &res)
+            { res.set_content("Hello World from MITK!", "text/plain"); });
+    std::future<void> ft = std::async(std::launch::async, serverlambda);
+    while (!svr.is_running())
+      ;
+    CPPUNIT_ASSERT_MESSAGE("Server is running", svr.is_running());
+    svr.stop();
+  }
+
+  void OpenListenerGetRequestSamePath_ReturnExpectedJSON()
+  {
+    httplib::Server svr;
+    auto serverlambda = [&]() { svr.listen("localhost", 8080); };
+    std::map<size_t, std::string> msgdb;
+    msgdb[0] = "hello_MITK";
+
+    svr.Get(R"(/msg/(\d+))",
+            [&](const httplib::Request &req, httplib::Response &res)
+            {
+              auto n = req.matches[1];
+              nlohmann::json jRes;
+              try
+              {
+                jRes["id"] = std::stoi(n);
+                jRes["msg"] = msgdb[std::stoi(n)];
+
+                res.set_content(jRes.dump(), "application/json");
+              }
+              catch (const std::exception &)
+              {
+                res.set_content("Cannot find the requested message.", "text/plain");
+              }
+            });
+    std::future<void> ft = std::async(std::launch::async, serverlambda);
+    while (!svr.is_running())
+      ;
+    
+    httplib::Client cli("http://localhost:8080");
+    auto response = cli.Get("/msg/1");
+    try
+    {
+      if (NULL == response)
+      {
+        CPPUNIT_ASSERT_MESSAGE("A connection duty cannot be established", false);
+      }
+      if (response->status == 200)
+      {
+        auto js = nlohmann::json::parse(response->body);
+        std::string msg = js["msg"];
+        CPPUNIT_ASSERT_MESSAGE("Result is the expected JSON value", msg == msgdb[0]);
+      }
+    }
+    catch (const std::exception &e) 
+    { 
+      svr.stop();
+      CPPUNIT_ASSERT_MESSAGE(e.what(), false);
+    }
+    svr.stop();
+  }
+ };
+
+MITK_TEST_SUITE_REGISTRATION(mitkRESTServerHttpLib)