Crosspost from boost, haven't received any reply there, see also: https://github.com/boostorg/test/issues/199 Hello, after my distribution rolled out the upgrade to Boost 1.69 I am unable to compile my application anymore. I try to get the log_level set. Minimal compiling example: #define BOOST_TEST_DYN_LINK #include <boost/test/unit_test.hpp> #include <boost/test/unit_test_parameters.hpp> bool init_unit_test() { using namespace boost::unit_test; auto logLevel = runtime_config::get<log_level>(runtime_config::btrt_log_level); return true; } int main(int argc, char* argv[]) { int retCode = boost::unit_test::unit_test_main( &init_unit_test, argc, argv ); return retCode; } which compiles fine g++ -std=c++11 -lboost_unit_test_framework boosttesting.cpp but gives an runtime error: % ./a.out Test setup error: boost::runtime::arg_type_mismatch: Access with invalid type for argument corresponding to parameter log_level Thanks! Florian