diff --git a/gcc/testsuite/gcc.dg/signbit-2.c b/gcc/testsuite/gcc.dg/signbit-2.c
index fc0157cbc5c7996b481f2998bc30176c96a669bb..d8501e9b7a2d82b511ad0b3a44c0121d635972c0 100644
--- a/gcc/testsuite/gcc.dg/signbit-2.c
+++ b/gcc/testsuite/gcc.dg/signbit-2.c
@@ -1,6 +1,10 @@
 /* { dg-do assemble } */
 /* { dg-options "-O3 --save-temps -fdump-tree-optimized" } */
 
+/* This test does not work when the truth type does not match vector type.  */
+/* { dg-additional-options "-mno-avx512f" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-march=armv8-a" { target aarch64_sve } } */
+
 #include <stdint.h>
 
 void fun1(int32_t *x, int n)
@@ -15,5 +19,5 @@ void fun2(int32_t *x, int n)
       x[i] = (-x[i]) >> 30;
 }
 
-/* { dg-final { scan-tree-dump-times {\s+>\s+\{ 0, 0, 0, 0 \}} 1 optimized } } */
+/* { dg-final { scan-tree-dump {\s+>\s+\{ 0, 0, 0(, 0)+ \}} optimized } } */
 /* { dg-final { scan-tree-dump-not {\s+>>\s+31} optimized } } */
diff --git a/gcc/testsuite/gcc.dg/signbit-5.c b/gcc/testsuite/gcc.dg/signbit-5.c
index 22a92704773e3282759524b74d35196a477d43dd..2b119cdfda7d2888f914633c809b0aa7da5244b7 100644
--- a/gcc/testsuite/gcc.dg/signbit-5.c
+++ b/gcc/testsuite/gcc.dg/signbit-5.c
@@ -1,6 +1,11 @@
 /* { dg-do run } */
 /* { dg-options "-O3" } */
 
+/* This test does not work when the truth type does not match vector type.  */
+/* { dg-additional-options "-mno-avx512f" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-additional-options "-march=armv8-a" { target aarch64_sve } } */
+
+
 #include <stdint.h>
 #include <limits.h>
 #include <stdio.h>