diff --git a/druntime/test/exceptions/src/memoryerror_stackoverflow.d b/druntime/test/exceptions/src/memoryerror_stackoverflow.d
index f54d78d26a19..729174f199db 100644
--- a/druntime/test/exceptions/src/memoryerror_stackoverflow.d
+++ b/druntime/test/exceptions/src/memoryerror_stackoverflow.d
@@ -1,16 +1,19 @@
 import etc.linux.memoryerror;
+import core.volatile;
 
 pragma(inline, false):
 
 void f(ref ubyte[1024] buf)
 {
     ubyte[1024] cpy = buf;
+    volatileStore(&cpy[0], 1);
     g(cpy);
 }
 
 void g(ref ubyte[1024] buf)
 {
     ubyte[1024] cpy = buf;
+    volatileStore(&cpy[0], 2);
     f(cpy);
 }