diff --git a/src/tests/vm/pt-big-stk-obj.c b/src/tests/vm/pt-big-stk-obj.c
new file mode 100644
index 0000000000000000000000000000000000000000..6b630ecec0255068c020eb6afd1eab1b731d719c
--- /dev/null
+++ b/src/tests/vm/pt-big-stk-obj.c
@@ -0,0 +1,20 @@
+/* Allocates and writes to a 64 kB object on the stack.
+   This must succeed. */
+
+#include <string.h>
+#include "tests/arc4.h"
+#include "tests/cksum.h"
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void)
+{
+  char stk_obj[65536];
+  struct arc4 arc4;
+
+  arc4_init (&arc4, "foobar", 6);
+  memset (stk_obj, 0, sizeof stk_obj);
+  arc4_crypt (&arc4, stk_obj, sizeof stk_obj);
+  msg ("cksum: %lu", cksum (stk_obj, sizeof stk_obj));
+}