diff --git a/test/SemaCXX/writable-strings-deprecated.cpp b/test/SemaCXX/writable-strings-deprecated.cpp
index c89c882..66b5994 100644
--- a/test/SemaCXX/writable-strings-deprecated.cpp
+++ b/test/SemaCXX/writable-strings-deprecated.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -Wno-deprecated-writable-strings -verify %s
+// RUN: %clang_cc1 -fsyntax-only -fwritable-strings -verify %s
 // rdar://8827606
 
 char *fun(void)