diff --git a/gcc/testsuite/gcc.dg/pr100509.c b/gcc/testsuite/gcc.dg/pr100509.c
index 9405e2a27df846185ac73a1c02000dde221434df..38e7002ae026d469c1e62f2afa10746c7e66ecc1 100644
--- a/gcc/testsuite/gcc.dg/pr100509.c
+++ b/gcc/testsuite/gcc.dg/pr100509.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-O" } */
+/* { dg-require-alias "" } */
 
 struct X {
   int a;
diff --git a/gcc/testsuite/gcc.dg/pragma-diag-10.c b/gcc/testsuite/gcc.dg/pragma-diag-10.c
index 127b299939af9fbbc8c4dc31ba0896d27136afa9..a1637bea26b3f0be45e206d1a40d1478c2ac629b 100644
--- a/gcc/testsuite/gcc.dg/pragma-diag-10.c
+++ b/gcc/testsuite/gcc.dg/pragma-diag-10.c
@@ -1,7 +1,8 @@
 /* PR middle-end/98512 - #pragma GCC diagnostic ignored ineffective
    in conjunction with alias attribute
    { dg-do compile }
-   { dg-options "-O2 -Wall" } */
+   { dg-options "-O2 -Wall" }
+   { dg-require-alias "" } */
 
 void *
 __rawmemchr_ppc (const void *s, int c)