diff --git a/clang/test/Frontend/rewrite-includes-bom.c b/clang/test/Frontend/rewrite-includes-bom.c
index caa431ad9aaff..059cfa3be5bc8 100644
--- a/clang/test/Frontend/rewrite-includes-bom.c
+++ b/clang/test/Frontend/rewrite-includes-bom.c
@@ -1,8 +1,7 @@
-// RUN: grep -q $'^\xEF\xBB\xBF' %S/Inputs/rewrite-includes-bom.h
+// RUN: cat %S/Inputs/rewrite-includes-bom.h | od -t x1 | grep -q 'ef bb bf'
 // RUN: %clang_cc1 -E -frewrite-includes -I %S/Inputs %s -o %t.c
-// RUN: ! grep -q $'\xEF\xBB\xBF' %t.c
+// RUN: cat %t.c | od -t x1 | not grep -q 'ef bb bf'
 // RUN: %clang_cc1 -fsyntax-only -verify %t.c
 // expected-no-diagnostics
-// REQUIRES: shell
 
 #include "rewrite-includes-bom.h"