diff --git a/test/helpers/unordered.hpp b/test/helpers/unordered.hpp
new file mode 100644
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--- /dev/null
+++ b/test/helpers/unordered.hpp
@@ -0,0 +1,21 @@
+
+// Copyright 2022 Christian Mazakas
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#if !defined(BOOST_UNORDERED_TEST_HELPERS_UNORDERED_HEADER)
+#define BOOST_UNORDERED_TEST_HELPERS_UNORDERED_HEADER
+
+// clang-format off
+#include "prefix.hpp"
+#ifdef BOOST_UNORDERED_FOA_TESTS
+#include <boost/unordered_flat_set.hpp>
+#include <boost/unordered_flat_map.hpp>
+#include <boost/unordered/detail/implementation.hpp>
+#else
+#include <boost/unordered_set.hpp>
+#include <boost/unordered_map.hpp>
+#endif
+#include "postfix.hpp"
+
+#endif