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diff --git a/src/hooks/dhcp/flex_option/libloadtests/load_unload_unittests.cc b/src/hooks/dhcp/flex_option/libloadtests/load_unload_unittests.cc
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+++ b/src/hooks/dhcp/flex_option/libloadtests/load_unload_unittests.cc
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+// Copyright (C) 2019 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+/// @file This file contains tests which exercise the load and unload
+/// functions in the flexible option hook library. In order to test the load
+/// function, one must be able to pass it hook library parameters. The
+/// the only way to populate these parameters is by actually loading the
+/// library via HooksManager::loadLibraries().
+
+#include <config.h>
+
+#include <flex_option.h>
+#include <hooks/hooks_manager.h>
+
+#include <gtest/gtest.h>
+#include <errno.h>
+
+using namespace std;
+using namespace isc;
+using namespace isc::hooks;
+using namespace isc::data;
+using namespace isc::dhcp;
+
+namespace {
+
+/// @brief Test fixture for testing loading and unloading the flex-option library
+class LibLoadTest : public ::testing::Test {
+public:
+    /// @brief Constructor
+    LibLoadTest() {
+        reset();
+    }
+
+    /// @brief Destructor
+    /// Removes files that may be left over from previous tests
+    virtual ~LibLoadTest() {
+        reset();
+    }
+
+    /// @brief Removes files that may be left over from previous tests
+    virtual void reset() {
+        HooksManager::unloadLibraries();
+    }
+
+    void addLib(const std::string& lib, ConstElementPtr params) {
+        libraries_.push_back(make_pair(lib, params));
+    }
+
+    void loadLibs() {
+        EXPECT_TRUE(HooksManager::loadLibraries(libraries_));
+    }
+
+    void unloadLibs() {
+        EXPECT_NO_THROW(HooksManager::unloadLibraries());
+    }
+
+    HookLibsCollection libraries_;
+};
+
+// Simple test that checks the library can be loaded and unloaded several times.
+TEST_F(LibLoadTest, validLoad) {
+
+    // Prepare parameters for the callout parameters library.
+    ElementPtr params = Element::createMap();
+    ElementPtr options = Element::createList();
+    params->set("options", options);
+
+    addLib(FLEX_OPTION_LIB_SO, params);
+
+    loadLibs();
+    unloadLibs();
+
+    loadLibs();
+    unloadLibs();
+}
+
+} // end of anonymous namespace