diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6afc2f05bfb..26100368a8d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-07-30  Martin Sebor  <msebor@redhat.com>
+
+	PR testsuite/91258
+	* g++.dg/ubsan/vla-1.C: Suppress a valid warning.
+
 2019-07-30  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/91296
diff --git a/gcc/testsuite/g++.dg/ubsan/vla-1.C b/gcc/testsuite/g++.dg/ubsan/vla-1.C
index 311cdb1d77a..81e93e3b7ad 100644
--- a/gcc/testsuite/g++.dg/ubsan/vla-1.C
+++ b/gcc/testsuite/g++.dg/ubsan/vla-1.C
@@ -1,8 +1,14 @@
 // { dg-do run }
-// { dg-options "-Wno-vla -fsanitize=undefined" }
+// { dg-options "-Wno-vla -Wno-stringop-overflow -fsanitize=undefined" }
 // { dg-output "index 1 out of bounds" }
 
-void f(int i) {
+void f(int i)
+{
+  /* The following creates an array of char[4] on the stack and
+     the initialization triggers a -Wstringop-overflow with LTO
+     (or when the function is inlined into the called, such as
+     with -fwhole-program).  See PR91258.  The warning is
+     suppressed above.  */
   int ar[i] = { 42, 24 };
 }