diff --git a/utils/libcxx/test/config.py b/utils/libcxx/test/config.py
index 6f88a35..67927c9 100644
--- a/utils/libcxx/test/config.py
+++ b/utils/libcxx/test/config.py
@@ -668,6 +668,9 @@
                 self.config.available_features.add('libcpp-abi-version-v%s'
                     % feature_macros[m])
                 continue
+            if m == '_LIBCPP_NO_VCRUNTIME':
+                self.config.available_features.add('libcpp-no-vcruntime')
+                continue
             assert m.startswith('_LIBCPP_HAS_') or m.startswith('_LIBCPP_ABI_')
             m = m.lower()[1:].replace('_', '-')
             self.config.available_features.add(m)