--- FindCxxTest.cmake	Fri Jun  7 17:22:14 2013
+++ FindCxxTest.cmake	Tue Jun 11 01:11:38 2013
@@ -137,6 +137,7 @@
     )
 
     set_source_files_properties(${_cxxtest_real_outfname} PROPERTIES GENERATED true)
+    set_source_files_properties(${ARGN} PROPERTIES HEADER_FILE_ONLY true)
     add_executable(${_cxxtest_testname} ${_cxxtest_real_outfname} ${ARGN})
 
     if(CMAKE_RUNTIME_OUTPUT_DIRECTORY)