diff --git a/gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-3.C b/gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-3.C

index 47f97dcb636..66f07aaa749 100644

--- a/gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-3.C

+++ b/gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-3.C

@@ -4,6 +4,8 @@

    { dg-do compile { target c++11 } }

    { dg-options "-O2 -Wall" } */

+#define _GLIBCXX_USE_CXX11_ABI 1

+

 #include <memory>

 #include <string>

diff --git a/gcc/testsuite/g++.dg/torture/pr106922.C b/gcc/testsuite/g++.dg/torture/pr106922.C

index 046fc6cce76..4214a31f276 100644

--- a/gcc/testsuite/g++.dg/torture/pr106922.C

+++ b/gcc/testsuite/g++.dg/torture/pr106922.C

@@ -4,6 +4,8 @@

 // -O1 doesn't iterate VN and thus has bogus uninit diagnostics

 // { dg-skip-if "" { *-*-* } { "-O1" } { "" } }

+#define _GLIBCXX_USE_CXX11_ABI 1

+

 #include <vector>

 #include <optional>