diff --git a/lib/slub_kunit.c b/lib/slub_kunit.c
index 8662dc6cb509..e8b13b62029d 100644
--- a/lib/slub_kunit.c
+++ b/lib/slub_kunit.c
@@ -39,7 +39,7 @@ static void test_next_pointer(struct kunit *test)
 
 	ptr_addr = (unsigned long *)(p + s->offset);
 	tmp = *ptr_addr;
-	p[s->offset] = 0x12;
+	p[s->offset] = ~p[s->offset];
 
 	/*
 	 * Expecting three errors.