--- libmalloc/libmalloc-374.60.3/tests/memory_pressure.c
+++ libmalloc/libmalloc-283.100.6/tests/memory_pressure.c
@@ -33,70 +33,6 @@
 			i++;
 		}
 	}
-}
-
-T_DECL(tiny_mem_pressure, "tiny memory pressure",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(100000);
-		}
-	});
-	stress(128, 50000);
-	T_PASS("didn't crash");
-}
-
-T_DECL(small_mem_pressure, "small memory pressure thread",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(10000);
-		}
-	});
-	stress(512, 20000);
-	T_PASS("didn't crash");
-}
-
-T_DECL(medium_mem_pressure, "medium memory pressure thread",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_MAYFAIL("Disabled until rdar://83904507 is fixed"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(100000);
-		}
-	});
-	stress(64*1024, 1000);
-	T_PASS("didn't crash");
 }
 
 T_DECL(tiny_mem_pressure_multi, "test memory pressure in tiny on threads",