diff --git a/test/SConscript b/test/SConscript
index e7ee1c8a3..9543a3215 100644
--- a/test/SConscript
+++ b/test/SConscript
@@ -30,12 +30,8 @@ localenv['ENV']['CANTERA_DATA'] = Dir('#build/data').abspath
 
 PASSED_FILES = {}
 
-# Needed for Intel runtime libraries when compiling with ICC
 # Add build/lib in order to find Cantera shared library
-if localenv['ENV'].get('LD_LIBRARY_PATH'):
-    localenv['ENV']['LD_LIBRARY_PATH'] += os.pathsep + Dir('#build/lib').abspath
-else:
-    localenv['ENV']['LD_LIBRARY_PATH'] = Dir('#build/lib').abspath
+localenv.PrependENVPath('LD_LIBRARY_PATH', Dir('#build/lib').abspath)
 
 def addTestProgram(subdir, progName, env_vars={}):
     """
diff --git a/test_problems/SConscript b/test_problems/SConscript
index 35ea7e9a6..aad5635ca 100644
--- a/test_problems/SConscript
+++ b/test_problems/SConscript
@@ -33,10 +33,7 @@ else:
 localenv['ENV']['CANTERA_DATA'] = pjoin(os.getcwd(), '..', 'build', 'data')
 
 # Add build/lib in order to find Cantera shared library
-if localenv['ENV'].get('LD_LIBRARY_PATH'):
-    localenv['ENV']['LD_LIBRARY_PATH'] += os.pathsep + Dir('#build/lib').abspath
-else:
-    localenv['ENV']['LD_LIBRARY_PATH'] = Dir('#build/lib').abspath
+localenv.PrependENVPath('LD_LIBRARY_PATH', Dir('#build/lib').abspath)
 
 PASSED_FILES = {}