diff --git a/clang/test/Preprocessor/indent_macro.c b/clang/test/Preprocessor/indent_macro.c
index e69500750f51a..f1430e9576422 100644
--- a/clang/test/Preprocessor/indent_macro.c
+++ b/clang/test/Preprocessor/indent_macro.c
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -E %s | grep '^   zzap$'
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace
+// CHECK:   zzap
 
 // zzap is on a new line, should be indented.
 #define BLAH  zzap
diff --git a/clang/test/Preprocessor/macro_fn_varargs_named.c b/clang/test/Preprocessor/macro_fn_varargs_named.c
index b50d53d46d015..d27f5b3985baa 100644
--- a/clang/test/Preprocessor/macro_fn_varargs_named.c
+++ b/clang/test/Preprocessor/macro_fn_varargs_named.c
@@ -1,6 +1,9 @@
-// RUN: %clang_cc1 -E %s | grep '^a: x$'
-// RUN: %clang_cc1 -E %s | grep '^b: x y, z,h$'
-// RUN: %clang_cc1 -E %s | grep '^c: foo(x)$'
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace --check-prefix CHECK-1
+// CHECK-1:a: x
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace --check-prefix CHECK-2
+// CHECK-2:b: x y, z,h
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace --check-prefix CHECK-3
+// CHECK-3:c: foo(x)
 
 #define A(b, c...) b c
 a: A(x)
diff --git a/clang/test/Preprocessor/macro_not_define.c b/clang/test/Preprocessor/macro_not_define.c
index 82648d47d447b..c0e9c85831118 100644
--- a/clang/test/Preprocessor/macro_not_define.c
+++ b/clang/test/Preprocessor/macro_not_define.c
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -E %s | grep '^ # define X 3$'
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace
+// CHECK: # define X 3
 
 #define H # 
  #define D define 
diff --git a/clang/test/Preprocessor/macro_rparen_scan.c b/clang/test/Preprocessor/macro_rparen_scan.c
index e4de5dbcef0c9..7dfa98e4a88cd 100644
--- a/clang/test/Preprocessor/macro_rparen_scan.c
+++ b/clang/test/Preprocessor/macro_rparen_scan.c
@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -E %s | grep '^3 ;$'
+// RUN: %clang_cc1 -E %s | FileCheck %s --match-full-lines --strict-whitespace
+// CHECK:3 ;
 
 /* Right paren scanning, hard case.  Should expand to 3. */
 #define i(x) 3