--- libmalloc/libmalloc-166.200.60/tests/calloc_test.c
+++ libmalloc/libmalloc-283/tests/calloc_test.c
@@ -10,6 +10,8 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <malloc/malloc.h>
+
+T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true));
 
 static inline void*
 t_calloc(size_t count, size_t s)