--- libmalloc/libmalloc-521.100.59/tests/malloc_msl.c
+++ /dev/null
@@ -1,52 +0,0 @@
-//
-//  malloc_msl.c
-//  libmalloc
-//
-//  Test for enabling malloc stack logging while concurrently adding other zones
-//
-
-#include <MallocStackLogging/MallocStackLogging.h>
-#include <darwintest.h>
-#include <malloc/malloc.h>
-
-#define N_ZONE_CREATION_THREADS 8
-
-static void *
-msl_thread(void *arg)
-{
-	T_LOG("enable MSL");
-	bool enable = msl_turn_on_stack_logging(msl_mode_lite);
-	T_ASSERT_TRUE(enable, "msl_turn_on_stack_logging returned false");
-	usleep(500);
-	msl_turn_off_stack_logging();
-	usleep(500);
-
-	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_enable_msl_lite, "enable the malloc stack logging lite zone while constantly registering zones")
-{
-	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 msl;
-	pthread_create(&msl, NULL, msl_thread, NULL);
-	pthread_join(msl, NULL);
-	T_PASS("finished without crashing");
-}