diff --git a/primitives/src/locktime/absolute.rs b/primitives/src/locktime/absolute.rs
index ae924e26b..da8ef86b7 100644
--- a/primitives/src/locktime/absolute.rs
+++ b/primitives/src/locktime/absolute.rs
@@ -501,6 +501,9 @@ mod tests {
         assert!(lock_by_height.is_satisfied_by(height_same, time));
         assert!(lock_by_height.is_satisfied_by(height_above, time));
         assert!(!lock_by_height.is_satisfied_by(height_below, time));
+
+        let lock_by_height_above = LockTime::from_consensus(800_000);
+        assert!(lock_by_height < lock_by_height_above)
     }
 
     #[test]
@@ -516,6 +519,9 @@ mod tests {
         assert!(lock_by_time.is_satisfied_by(height, time_same));
         assert!(lock_by_time.is_satisfied_by(height, time_after));
         assert!(!lock_by_time.is_satisfied_by(height, time_before));
+
+        let lock_by_time_after = LockTime::from_consensus(1653282000);
+        assert!(lock_by_time < lock_by_time_after);
     }
 
     #[test]
diff --git a/primitives/src/locktime/relative.rs b/primitives/src/locktime/relative.rs
index 0874225b2..2cca3889b 100644
--- a/primitives/src/locktime/relative.rs
+++ b/primitives/src/locktime/relative.rs
@@ -501,6 +501,9 @@ mod tests {
         assert!(!lock_by_height1.is_same_unit(lock_by_time1));
         assert!(lock_by_time1.is_same_unit(lock_by_time2));
         assert!(!lock_by_time1.is_same_unit(lock_by_height1));
+
+        assert!(lock_by_height1 < lock_by_height2);
+        assert!(lock_by_time1 < lock_by_time2);
     }
 
     #[test]