cmake_minimum_required(VERSION 3.1) project(TestPython2Fail C) include(CTest) find_package(Python2 REQUIRED COMPONENTS Interpreter Development foobar) Python2_add_library (spam2 MODULE ../spam.c) target_compile_definitions (spam2 PRIVATE PYTHON2) add_test (NAME python2_spam2 COMMAND "${CMAKE_COMMAND}" -E env "PYTHONPATH=$" "${Python2_EXECUTABLE}" -c "import spam2; spam2.system(\"cd\")")