diff --git a/openmp/libomptarget/test/lit.cfg b/openmp/libomptarget/test/lit.cfg
--- a/openmp/libomptarget/test/lit.cfg
+++ b/openmp/libomptarget/test/lit.cfg
@@ -102,6 +102,8 @@
         config.test_flags += " --libomptarget-nvptx-bc-path=" + config.library_dir
     if config.libomptarget_current_target.endswith('-newRTL'):
         config.test_flags += " -fopenmp-target-new-runtime"
+    else:
+        config.test_flags += " -fno-openmp-target-new-runtime"
 
 # substitutions
 # - for targets that exist in the system create the actual command.