--- libmalloc/libmalloc-657.80.3/tests/pgm_testing.h
+++ libmalloc/libmalloc-521.100.59/tests/pgm_testing.h
@@ -134,6 +134,7 @@
 static metadata_t metadata[10];
 static pgm_zone_t zone = {
 	.wrapped_zone = &wrapped_zone,
+	.min_alignment = 4,  // Use weird alignment to expose implicit assumptions.
 	.slots = slots,
 	.metadata = metadata
 };