--- libmalloc/libmalloc-409.81.2/tests/malloc_zero.c
+++ libmalloc/libmalloc-521.120.7/tests/malloc_zero.c
@@ -1,6 +1,8 @@
 #include <stdlib.h>
 #include <darwintest.h>
 #include <malloc_private.h>
+
+T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true), T_META_TAG_XZONE);
 
 T_DECL(malloc_checkfix_zero_on_free, "Test malloc_zero_on_free_disable() SPI",
 		T_META_ENVVAR("MallocZeroOnFree=1"))