diff --git a/libcxx/utils/libcxx/test/config.py b/libcxx/utils/libcxx/test/config.py
index 1c51acdf65f27f..ca0385a16977eb 100644
--- a/libcxx/utils/libcxx/test/config.py
+++ b/libcxx/utils/libcxx/test/config.py
@@ -71,7 +71,6 @@ def __init__(self, lit_config, config):
         self.link_shared = self.get_lit_bool('enable_shared', default=True)
         self.debug_build = self.get_lit_bool('debug_build',   default=False)
         self.exec_env = dict()
-        self.use_system_cxx_lib = self.get_lit_bool('use_system_cxx_lib', False)
         self.use_clang_verify = False
 
     def get_lit_conf(self, name, default=None):