diff --git a/src/round.rs b/src/round.rs
index ef3e39d2ba..f30422e3e9 100644
--- a/src/round.rs
+++ b/src/round.rs
@@ -517,7 +517,7 @@ mod tests {
             "2020-10-28 00:00:00 +01:00"
         );
         assert_eq!(
-            dt.duration_round(TimeDelta::weeks(1)).unwrap().to_string(),
+            dt.duration_round(TimeDelta::try_weeks(1).unwrap()).unwrap().to_string(),
             "2020-10-29 00:00:00 +01:00"
         );
 
@@ -529,7 +529,7 @@ mod tests {
             "2020-10-28 00:00:00 -01:00"
         );
         assert_eq!(
-            dt.duration_round(TimeDelta::weeks(1)).unwrap().to_string(),
+            dt.duration_round(TimeDelta::try_weeks(1).unwrap()).unwrap().to_string(),
             "2020-10-29 00:00:00 -01:00"
         );
     }
@@ -679,7 +679,7 @@ mod tests {
             "2020-10-27 00:00:00 +01:00"
         );
         assert_eq!(
-            dt.duration_trunc(TimeDelta::weeks(1)).unwrap().to_string(),
+            dt.duration_trunc(TimeDelta::try_weeks(1).unwrap()).unwrap().to_string(),
             "2020-10-22 00:00:00 +01:00"
         );
 
@@ -691,7 +691,7 @@ mod tests {
             "2020-10-27 00:00:00 -01:00"
         );
         assert_eq!(
-            dt.duration_trunc(TimeDelta::weeks(1)).unwrap().to_string(),
+            dt.duration_trunc(TimeDelta::try_weeks(1).unwrap()).unwrap().to_string(),
             "2020-10-22 00:00:00 -01:00"
         );
     }
diff --git a/src/time_delta.rs b/src/time_delta.rs
index f9bdffa58e..9f5b7b6a65 100644
--- a/src/time_delta.rs
+++ b/src/time_delta.rs
@@ -616,6 +616,7 @@ impl arbitrary::Arbitrary<'_> for TimeDelta {
 mod tests {
     use super::OutOfRangeError;
     use super::{TimeDelta, MAX, MIN};
+    use crate::expect;
     use core::time::Duration;
 
     #[test]
@@ -1188,7 +1189,7 @@ mod tests {
 
     #[test]
     fn test_duration_const() {
-        const ONE_WEEK: TimeDelta = TimeDelta::weeks(1);
+        const ONE_WEEK: TimeDelta = expect!(TimeDelta::try_weeks(1), "");
         const ONE_DAY: TimeDelta = TimeDelta::days(1);
         const ONE_HOUR: TimeDelta = TimeDelta::hours(1);
         const ONE_MINUTE: TimeDelta = TimeDelta::minutes(1);