--- libmalloc/libmalloc-646.40.3/tests/realloc.c
+++ libmalloc/libmalloc-657.60.21/tests/realloc.c
@@ -24,8 +24,9 @@
 T_DECL(reallocf_failure, "reallocf failure", T_META_TAG_XZONE,
 		T_META_TAG("no_debug"), T_META_TAG_VM_NOT_PREFERRED)
 {
-	void *a = malloc(16);
-	T_ASSERT_NOTNULL(a, "malloc(16)");
+	// rdar://134443969: Avoid the tiny zone because it may madvise
+	void *a = malloc(65536);
+	T_ASSERT_NOTNULL(a, "malloc(65536)");
 	void *b = reallocf(a, SIZE_MAX - (1 << 17));
 	errno_t error = errno;
 	size_t a_sz = malloc_size(a);