diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h
index a00168730445..0ec7d14d354e 100644
--- a/mm/damon/tests/core-kunit.h
+++ b/mm/damon/tests/core-kunit.h
@@ -1546,6 +1546,20 @@ static void damon_test_walk_control_obsolete(struct kunit *test)
 	damon_destroy_ctx(ctx);
 }
 
+static void damon_test_rand(struct kunit *test)
+{
+	struct damon_ctx ctx;
+	int i;
+
+	prandom_seed_state(&ctx.rnd_state, get_random_u64());
+	for (i = 0; i < 10000; i++) {
+		unsigned long rnd = damon_rand(&ctx, 0, 10);
+
+		KUNIT_EXPECT_GE(test, rnd, 0);
+		KUNIT_EXPECT_LE(test, rnd, 9);
+	}
+}
+
 static struct kunit_case damon_test_cases[] = {
 	KUNIT_CASE(damon_test_target),
 	KUNIT_CASE(damon_test_regions),
@@ -1577,6 +1591,7 @@ static struct kunit_case damon_test_cases[] = {
 	KUNIT_CASE(damon_test_apply_min_nr_regions),
 	KUNIT_CASE(damon_test_is_last_region),
 	KUNIT_CASE(damon_test_walk_control_obsolete),
+	KUNIT_CASE(damon_test_rand),
 	{},
 };