diff --git a/src/string/naive.c b/src/string/naive.c
index 5a796ee..4cacb22 100644
--- a/src/string/naive.c
+++ b/src/string/naive.c
@@ -18,6 +18,13 @@ static void _ft_string_naive(ft_test *t)
 	ft_assert(t, strrchr(s1, 'w') == NULL);
 	ft_assert(t, strchrnul(s1, 't') == s1 + 3);
 	ft_assert(t, strchrnul(s1, 'w') == s1 + 12);
+	ft_assert(t, memrchr(s1, 'u', 12) == s1 + 10);
+	ft_assert(t, memrchr(s1, 'u', 11) == s1 + 10);
+	ft_assert(t, memrchr(s1, 'u', 10) == s1 + 4);
+	ft_assert(t, memrchr(s1, 0, 13) == s1 + 12);
+	ft_assert(t, memrchr(s1, 0, 12) == NULL);
+	ft_assert(t, memrchr(s1, 'x', 12) == s1 + 6);
+	ft_assert(t, memrchr(s1, 'w', 13) == NULL);
 
 	ft_assert(t, strcmp("xyz", "xyz") == 0);
 	ft_assert(t, strcmp("xyz\0t", "xyz\0v") == 0);