diff --git a/libcxx/utils/libcxx/test/config.py b/libcxx/utils/libcxx/test/config.py
index c1bba1167d9a3..fd6f1bf5accd6 100644
--- a/libcxx/utils/libcxx/test/config.py
+++ b/libcxx/utils/libcxx/test/config.py
@@ -52,7 +52,7 @@ def configure(parameters, features, config, lit_config):
 
     # Print the basic substitutions
     for sub in ("%{cxx}", "%{flags}", "%{compile_flags}", "%{link_flags}", "%{benchmark_flags}", "%{exec}"):
-        note("Using {} substitution: '{}'".format(sub, _getSubstitution(sub, config.substitutions)))
+        debug("Using {} substitution: '{}'".format(sub, _getSubstitution(sub, config.substitutions)))
 
     # Print all available features
     note("All available features: {}".format(", ".join(sorted(config.available_features))))