--- libmalloc/libmalloc-521.100.59/tests/malloc_create_purgeable_zone.c
+++ /dev/null
@@ -1,52 +0,0 @@
-//
-//  malloc_create_purgeable_zone.c
-//  libmalloc
-//
-//  Test for creating a purgeable zone while concurrently adding/removing other zones
-//
-
-#include <darwintest.h>
-#include <malloc/malloc.h>
-
-#define N_ZONE_CREATION_THREADS 8
-
-static void *
-make_purgeable_thread(void *arg)
-{
-	T_LOG("enable PGM");
-	malloc_zone_t *purgeable_zone = malloc_default_purgeable_zone();
-	T_ASSERT_NOTNULL(purgeable_zone, "malloc_default_purgeable_zone returned NULL");
-
-	return NULL;
-}
-
-static void *
-zone_thread(void *arg)
-{
-	vm_size_t start_size = (vm_size_t)arg;
-	while (1) {
-		malloc_zone_t *zone = malloc_create_zone(start_size, 0);
-		malloc_destroy_zone(zone);
-	}
-	return NULL;
-}
-
-T_DECL(malloc_create_purgeable_zone, "create a purgeable zone while constantly registering zones",
-		T_META_TAG_XZONE)
-{
-	pthread_t zone_threads[N_ZONE_CREATION_THREADS];
-	for (int i = 0; i < N_ZONE_CREATION_THREADS; i++) {
-		vm_size_t zone_start_size = 1000;
-		pthread_create(&zone_threads[i], NULL, zone_thread, (void *)zone_start_size);
-	}
-
-	usleep(50);
-
-	pthread_t purgeable_thread;
-	pthread_create(&purgeable_thread, NULL, make_purgeable_thread, NULL);
-	pthread_join(purgeable_thread, NULL);
-
-	usleep(500);
-
-	T_PASS("finished without crashing");
-}