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diff --git a/src/lib/testutils/multi_threading_utils.h b/src/lib/testutils/multi_threading_utils.h
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+++ b/src/lib/testutils/multi_threading_utils.h
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+// Copyright (C) 2020 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/.
+
+#ifndef MULTI_THREADING_UTILS_H
+#define MULTI_THREADING_UTILS_H
+
+#include <util/multi_threading_mgr.h>
+
+namespace isc {
+namespace test {
+
+/// @brief A RAII class which disables the multi threading on exit of scope.
+///
+/// Usually the multi threading is disabled by the fixture destructor or
+/// TearDown but of course this works only when a fixture class is used.
+class MultiThreadingTest {
+public:
+
+    /// @brief Constructor (set multi threading mode).
+    ///
+    /// @param mode The mode to use in the body. Defaults to true / enabled.
+    MultiThreadingTest(bool mode = true) {
+        isc::util::MultiThreadingMgr::instance().setMode(mode);
+    }
+
+    /// @brief Destructor (disable multi threading).
+    ~MultiThreadingTest() {
+        isc::util::MultiThreadingMgr::instance().setMode(false);
+    }
+};
+
+} // end of isc::test namespace
+} // end of isc namespace
+
+#endif // MULTI_THREADING_UTILS_H