--- a/src/backends/maxima/CMakeLists.txt	2016-03-21 02:16:05.549024821 +0100
+++ b/src/backends/maxima/CMakeLists.txt	2016-03-21 02:22:07.951014021 +0100
@@ -21,12 +21,14 @@
   target_link_libraries(cantor_maximabackend KF5::Pty)
 endif(NOT WIN32)
 
+if (BUILD_TESTING)
 add_executable( testmaxima testmaxima.cpp)
 target_link_libraries( testmaxima
   cantorlibs
   cantortest
   ${QTTEST_LIBRARY}
 )
+endif()
 
 install( FILES cantor_maxima.knsrc  DESTINATION  ${KDE_INSTALL_CONFDIR} )
 install( FILES keywords.xml cantor-initmaxima.lisp DESTINATION ${KDE_INSTALL_DATADIR}/cantor/maximabackend)
--- a/src/backends/sage/CMakeLists.txt	2016-03-21 01:23:19.251791138 +0100
+++ b/src/backends/sage/CMakeLists.txt	2016-03-21 01:27:16.300827617 +0100
@@ -17,12 +17,14 @@
 
 target_link_libraries( cantor_sagebackend KF5::Pty)
 
+if (BUILD_TESTING)
 add_executable( testsage testsage.cpp)
 target_link_libraries( testsage
   ${QT_QTTEST_LIBRARY}
   cantorlibs
   cantortest
 )
+endif()
 
 install( FILES cantor_sage.knsrc  DESTINATION  ${KDE_INSTALL_CONFDIR} )
 install( FILES keywords.xml DESTINATION ${KDE_INSTALL_DATADIR}/cantor/sagebackend)
--- a/src/backends/python2/CMakeLists.txt	2016-03-21 01:28:39.055793038 +0100
+++ b/src/backends/python2/CMakeLists.txt	2016-03-21 01:35:01.451012440 +0100
@@ -20,10 +20,12 @@
     cantor_pythonbackend
     )
 
+if (BUILD_TESTING)
 add_executable(testpython2 testpython2.cpp)
 target_link_libraries(testpython2 ${QT_QTTEST_LIBRARY} cantorlibs cantortest)
 
 add_test(NAME testpython2 COMMAND testpython2)
+endif()
 
 install(FILES cantor_python2.knsrc  DESTINATION  ${KDE_INSTALL_CONFDIR})
 install(FILES python2backend.kcfg DESTINATION ${KDE_INSTALL_KCFGDIR})