diff --git a/pttodoer/src/main.rs b/pttodoer/src/main.rs
index d625f7f..915b913 100644
--- a/pttodoer/src/main.rs
+++ b/pttodoer/src/main.rs
@@ -75,7 +75,7 @@ mod test_when {
    fn parse() {
       match When::new("1d2h3m".to_string()) {
          Ok(when) => {
-            assert!(false, "not impl: {:?}", when);
+            assert_eq!(1714521600 + 60*3 + 60*60*2 + 60*60*24*1, when.next(TS::new("2024-05-01T00").unwrap()));
          },
          Err(err) => assert!(false, "failed to parse when: {}", err),
       };