--- a/gcc/testsuite/gcc.dg/c90-fordecl-1.c	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/testsuite/gcc.dg/c90-fordecl-1.c	Thu Feb 13 11:34:05 2020 +0900
@@ -9,6 +9,6 @@
   int j = 0;
   for (int i = 1; i <= 10; i++) /* { dg-bogus "warning" "warning in place of error" } */
     /* { dg-error "'for' loop initial declarations are only allowed in C99 or C11 mode" "declaration in for loop" { target *-*-* } .-1 } */
-    /* { dg-message "note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code" "note" { target *-*-* } .-2 }} */
+    /* { dg-message "note: use option '-std=c99', '-std=gnu99', '-std=c11' or '-std=gnu11' to compile your code" "note" { target *-*-* } .-2 }} */
     j += i;
 }