diff --git a/unitTesting/CMakeLists.txt b/unitTesting/CMakeLists.txt
index cee7fe3e2e24e6c52bb10bcd2881297edc9f6873..74327c1e8d0120be484aed8d1ce0ed2605226dad 100644
--- a/unitTesting/CMakeLists.txt
+++ b/unitTesting/CMakeLists.txt
@@ -69,8 +69,9 @@ FOREACH(test ${tests})
     ${samplemodelpath} sample.wrl ${samplespec} ${sampleljr} )
 
   IF (UNIX)
+    SET(EXTRA_LD_LIBRARY_PATH $ENV{LD_LIBRARY_PATH})
     SET_PROPERTY(TEST ${test} PROPERTY 
-      ENVIRONMENT "LD_LIBRARY_PATH=${CMAKE_INSTALL_PREFIX}/lib:${CMAKE_BINARY_DIR}/src:${BOOST_ROOT}/lib")
+      ENVIRONMENT "LD_LIBRARY_PATH=${CMAKE_INSTALL_PREFIX}/lib:${CMAKE_BINARY_DIR}/src:${BOOST_ROOT}/lib:${EXTRA_LD_LIBRARY_PATH}")
   ENDIF(UNIX)
 
 ENDFOREACH(test)