--- /dev/null
+++ Libc/Libc-1669.60.4/tests/acl_tests.c
@@ -0,0 +1,9 @@
+#include <darwintest.h>
+#include <sys/types.h>
+#include <sys/acl.h>
+
+T_DECL(acl_bad_test, "Tests invalid acl") {
+
+    acl_t acl = acl_from_text("!#acl");
+    T_EXPECT_NULL(acl, "Invalid acl detected");
+}