diff --git a/tests/arena/test_arena.c b/tests/arena/test_arena.c
index 45313d0..edb288d 100644
--- a/tests/arena/test_arena.c
+++ b/tests/arena/test_arena.c
@@ -1,6 +1,7 @@
 #include "test_arena.h"
 #include "aliases.h"
 #include "mem_arena.h"
+#include "misc_utils.h"
 #include "tester.h"
 #include <stdbool.h>
 #include <stdlib.h>
@@ -19,7 +20,7 @@ TestFuncResult test_arena_init(void) {
 
 TestFuncResult test_arena_init_succeeds_when_reserving_very_large_size(void) {
   Arena *large_arena = NULL;
-  u64 capacity = 512ull * 1024ull * 1024ull * 1024ull;
+  u64 capacity = GB(512);
   bool result = wapp_mem_arena_init(&large_arena, capacity,
                                     WAPP_MEM_ALLOC_RESERVE, false);
   if (result) {