Fetch tools/cmake instead of having a duplicate

test/CMakeLists.txt

@@ -2,7 +2,11 @@
 # 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
 
-include(BoostTestJamfile)
+include(BoostTestJamfile OPTIONAL RESULT_VARIABLE HAVE_BOOST_TEST)
+
+if(HAVE_BOOST_TEST)
 
 boost_test_jamfile(FILE Jamfile LIBRARIES Boost::mp11 Boost::core)
 boost_test(SOURCES check_cmake_version.cpp ARGUMENTS ${PROJECT_VERSION} LIBRARIES Boost::core Boost::config)
+
+endif()