diff --git a/test/Preprocessor/builtin_line.c b/test/Preprocessor/builtin_line.c
index 52228b5fdbf592e1d88c415bc1be2c72b7b54048..db5a103742896d1097f2001f991e3548da9c7a67 100644
--- a/test/Preprocessor/builtin_line.c
+++ b/test/Preprocessor/builtin_line.c
@@ -1,13 +1,15 @@
-// RUN: %clang_cc1 %s -E | grep "^  4"
+// RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s
 #define FOO __LINE__
 
   FOO
+// CHECK: {{^}}  4{{$}}
 
 // PR3579 - This should expand to the __LINE__ of the ')' not of the X.
-// RUN: %clang_cc1 %s -E | grep "^A 13"
 
 #define X() __LINE__
 
 A X(
 
 )
+// CHECK: {{^}}A 13{{$}}
+