diff --git a/tests/datetime.rs b/tests/datetime.rs
index 912f1b8..eb465c3 100644
--- a/tests/datetime.rs
+++ b/tests/datetime.rs
@@ -222,7 +222,7 @@ macro_rules! invalid_dt_test {
             }
             #[test]
             fn datetime_too_big() {
-                let dt = new_datetime(2101, 1, 2, 3, 4, 5);
+                let dt = new_datetime(2100, 1, 2, 3, 4, 5);
                 let mut dev = $create_method(&[]);
                 assert_invalid_input_data!(dev.set_datetime(&dt));
                 $destroy_method(dev);
@@ -236,7 +236,7 @@ macro_rules! invalid_dt_test {
             }
             #[test]
             fn date_too_big() {
-                let d = new_date(2101, 1, 2);
+                let d = new_date(2100, 1, 2);
                 let mut dev = $create_method(&[]);
                 assert_invalid_input_data!(dev.set_date(&d));
                 $destroy_method(dev);