Solid Sands B.V. has released SuperTest Van Gogh 6.0, an update to its SuperTest Compiler Test and Validation Suite with more than 1,900 new tests for C and C++ standards. The release adds 173 tests for C++20 modules, 440 tests for C++23 and 480 tests for C23, along with expanded coverage of library headers and Unicode source characters. The suite helps compiler developers and users assess language feature implementation and portability for safety-critical and other applications.