diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-pr65935.c b/gcc/testsuite/gcc.dg/vect/bb-slp-pr65935.c
index 8df35327e7ad02a674f3c4774f3af4bd17a9113d..9ef1330b47c817e16baaafa44c2b15108b9dd3a9 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-pr65935.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-pr65935.c
@@ -67,7 +67,8 @@ int main()
 
 /* We should also be able to use 2-lane SLP to initialize the real and
    imaginary components in the first loop of main.  */
-/* { dg-final { scan-tree-dump-times "optimized: basic block" 10 "slp1" } } */
+/* { dg-final { scan-tree-dump-times "optimized: basic block" 10 "slp1" { target {! { vect1024 } } } } } */
+/* { dg-final { scan-tree-dump-times "optimized: basic block" 11 "slp1" { target { { vect1024 } } } } } */
 /* We should see the s->phase[dir] operand splatted and no other operand built
    from scalars.  See PR97334.  */
 /* { dg-final { scan-tree-dump "Using a splat" "slp1" } } */
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index dc366d35a0a1e502357f930335ec55ab329bdb08..95c489d7f76e2332b87193ab36e5a7469a323833 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -8903,6 +8903,12 @@ proc check_effective_target_vect_variable_length { } {
     return [expr { [lindex [available_vector_sizes] 0] == 0 }]
 }
 
+# Return 1 if the target supports vectors of 1024 bits.
+
+proc check_effective_target_vect1024 { } {
+    return [expr { [lsearch -exact [available_vector_sizes] 1024] >= 0 }]
+}
+
 # Return 1 if the target supports vectors of 512 bits.
 
 proc check_effective_target_vect512 { } {