I have a Qt Unit test (sub)project, which generates me one class (with the main generated by QTEST_APPLESS_MAIN).I can start this from within Qt Creator as cons
Build with CMake and not QMake, and add two test targets.
add_executable(firstTest tst_testfirst.cpp)
add_test(NAME firstTest COMMAND firstTest)
add_executable(secondTest tst_testsecond.cpp)
add_test(NAME secondTest COMMAND secondTest)
Both tst_testfirst.cpp and tst_testsecond.cpp have their own QTEST_MAIN lines.
Qt Creator will run both test classes. If you're running them from the command line, you run the tests with "ctest".