diff --git a/libcxx/test/libcxx/lint/lint_libcpp_macros_in_tests.sh.cpp b/libcxx/test/libcxx/lint/lint_libcpp_macros_in_tests.sh.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/libcxx/lint/lint_libcpp_macros_in_tests.sh.cpp
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// Tests in test/std should work with all Standard library implementations.
+// This test greps for the usage of some libc++ internal defines that have a
+// TEST macro that achieves the same in a portable fashion.
+//
+// Upon failure the found results are part of the test's failure output. This
+// makes finding the occurrences easy.
+
+// Some items are whitelisted
+// - _LIBCPP_VERSION is used to test whether we're testing against libc++
+// - The language.support directory uses internal macros by generated scripts
+// - The experimental directory is a testing ground
+
+RUN: not grep -R --exclude-dir language.support --exclude-dir experimental '#if.*[ (]_LIBCPP' %S/../../std |grep -v ':.*_LIBCPP_VERSION'|grep -v ':.*_LIBCPP[A-Z_]*_ABI_'