diff --git a/test/lit.cfg b/test/lit.cfg
index ae884342..5e6ca125 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -324,6 +324,7 @@ if std is None:
 else:
     lit_config.note('using user specified std: \'-std={}\''.format(std))
 compile_flags += ['-std={}'.format(std)]
+config.available_features.add(std)
 
 built_w_san = getattr(config, 'llvm_use_sanitizer')
 if built_w_san and built_w_san.strip():