--- libmalloc/libmalloc-521.120.7/tests/pgm_allocator.c
+++ libmalloc/libmalloc-792.60.6/tests/pgm_allocator.c
@@ -12,7 +12,8 @@
 
 #include <darwintest.h>
 
-T_GLOBAL_META(T_META_RUN_CONCURRENTLY(TRUE), T_META_NAMESPACE("pgm"));
+T_GLOBAL_META(T_META_RUN_CONCURRENTLY(TRUE), T_META_NAMESPACE("pgm"),
+		T_META_TAG_VM_PREFERRED, T_META_TAG_NO_ALLOCATOR_OVERRIDE);
 
 // Use weird page size to expose implicit assumptions and help prevent issues
 // caused by different page sizes on macOS and iOS.
@@ -49,7 +50,8 @@
 	zone.max_allocations = 2; // is_full
 	zone.num_slots = 2; zone.rr_slot_index = 1; // choose_available_slot
 	zone.max_metadata = 4; zone.num_metadata = 2; // choose_metadata
-	expected_upper_bound = 2; rand_ret_value = false; // choose_offset_on_page
+	zone.left_align_pct = 10; // choose_offset_on_page
+	expected_upper_bound = 100; rand_ret_value = 10; // choose_offset_on_page
 	expected_trace_buffers[0] = metadata[2].trace_buffer; // capture_trace
 	expected_trace_sizes[0] = 216; collect_trace_ret_value = 88;
 	zone.begin = 640000; // page_addr
@@ -58,13 +60,13 @@
 	// Slot metadata
 	T_EXPECT_EQ((unsigned int)(slots[1].state), ss_allocated, "slot.state");
 	T_EXPECT_EQ((unsigned int)(slots[1].metadata), 2, "slot.metadata");
-	T_EXPECT_EQ(slots[1].size, (uint16_t)8, "slot.size"); // zone->min_alignment
+	T_EXPECT_EQ(slots[1].size, (uint16_t)16, "slot.size");
 	T_EXPECT_EQ(slots[1].offset, (uint16_t)1008, "slot.offset");
 	T_EXPECT_EQ(metadata[2].alloc.trace_size, (uint16_t)88, "metadata.alloc.trace_size");
 	// Zone state
 	T_EXPECT_EQ(zone.num_allocations, 1, "zone.num_allocations");
-	T_EXPECT_EQ(zone.size_in_use, 8ul, "zone.size_in_use");
-	T_EXPECT_EQ(zone.max_size_in_use, 8ul, "zone.max_size_in_use");
+	T_EXPECT_EQ(zone.size_in_use, 16ul, "zone.size_in_use");
+	T_EXPECT_EQ(zone.max_size_in_use, 16ul, "zone.max_size_in_use");
 
 	zone.max_size_in_use = 55;
 	expected_trace_buffers[1] = metadata[3].trace_buffer; expected_trace_sizes[1] = 216;
@@ -110,7 +112,8 @@
 	slots[0] = (slot_t){ .state = ss_allocated, .metadata = 1, .size = 5 }; // lookup_size
 	zone.max_allocations = 2; // is_full
 	zone.num_slots = 2; // allocate
-	expected_upper_bound = 2; rand_ret_value = true; // allocate -> choose_offset_on_page
+	zone.left_align_pct = 10; // allocate -> choose_offset_on_page
+	expected_upper_bound = 100; rand_ret_value = 9; // allocate -> choose_offset_on_page
 	zone.max_metadata = 1; // allocate -> choose_metadata
 	expected_trace_buffers[0] = metadata[0].trace_buffer; // allocate -> capture_trace
 	expected_trace_sizes[0] = 216;
@@ -129,7 +132,8 @@
 	expected_size_ptr = 1337; size_ret_value = 5; // wrapped_size
 	zone.max_allocations = 2; // is_full
 	zone.num_slots = 2; // allocate
-	expected_upper_bound = 2; rand_ret_value = true; // allocate -> choose_offset_on_page
+	zone.left_align_pct = 10; // allocate -> choose_offset_on_page
+	expected_upper_bound = 100; rand_ret_value = 9; // allocate -> choose_offset_on_page
 	zone.max_metadata = 1; // allocate -> choose_metadata
 	expected_trace_buffers[0] = metadata[0].trace_buffer; // allocate -> capture_trace
 	expected_trace_sizes[0] = 216;