diff --git a/compiler-rt/lib/asan/asan_rtl.cc b/compiler-rt/lib/asan/asan_rtl.cc
index c3cc1d3f333f..d9874016f575 100644
--- a/compiler-rt/lib/asan/asan_rtl.cc
+++ b/compiler-rt/lib/asan/asan_rtl.cc
@@ -269,7 +269,7 @@ void InitializeFlags(Flags *f, const char *env) {
   f->allow_reexec = true;
   f->print_full_thread_history = true;
   f->poison_heap = true;
-  f->poison_array_cookie = true;
+  f->poison_array_cookie = false;
   f->poison_partial = true;
   // Turn off alloc/dealloc mismatch checker on Mac and Windows for now.
   // https://code.google.com/p/address-sanitizer/issues/detail?id=131
diff --git a/compiler-rt/test/asan/TestCases/Linux/new_array_cookie_test.cc b/compiler-rt/test/asan/TestCases/Linux/new_array_cookie_test.cc
index 339120ba2d2b..49545f09355b 100644
--- a/compiler-rt/test/asan/TestCases/Linux/new_array_cookie_test.cc
+++ b/compiler-rt/test/asan/TestCases/Linux/new_array_cookie_test.cc
@@ -1,6 +1,6 @@
 // REQUIRES: asan-64-bits
-// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t
+// RUN                                     %run %t
 // RUN: ASAN_OPTIONS=poison_array_cookie=1 not %run %t 2>&1  | FileCheck %s
 // RUN: ASAN_OPTIONS=poison_array_cookie=0 %run %t
 #include <stdio.h>