Scanning the change log it doesn't seem likely boost.test was updated. Also given that the feature really just arrived in clang 10 in the last month and gcc 10 isn't yet released almost no one has reacted to operator<=> yet. All that said, most stuff like boost.test that uses operators shouldn't need to be modified. A deeper possibility here is boost.test is fine and that Leo might need to implement operator== with the operator<=>. Have a look thru this blog post
https://brevzin.github.io/c++/2019/07/28/comparisons-cpp20/