Here is the CMakeLists.txt of my package

find_package(catkin )
catkin_package()

add_executable (my_test main.cpp)

add_executable(my_test_imported IMPORTED)
set_target_properties(my_test_imported PROPERTIES IMPORTED_LOCATION "path")

rosrun packagename mytest

works, but

rosrun packagename mytest_imported

returns with :

[rosrun] Couldn't find executable named mytestimported below ...

How can I add an imported executable to my package ?