diff --git a/src/duration.rs b/src/duration.rs
index 91aaeb938..1e67ea78b 100644
--- a/src/duration.rs
+++ b/src/duration.rs
@@ -201,15 +201,15 @@ impl Duration {
     // region: constructors
     /// Create a new `Duration` without checking the validity of the components.
     pub(crate) const fn new_unchecked(seconds: i64, nanoseconds: i32) -> Self {
-        if seconds < 0 {
-            debug_assert!(nanoseconds <= 0);
-            debug_assert!(nanoseconds > -1_000_000_000);
-        } else if seconds > 0 {
-            debug_assert!(nanoseconds >= 0);
-            debug_assert!(nanoseconds < 1_000_000_000);
-        } else {
-            debug_assert!(nanoseconds.unsigned_abs() < 1_000_000_000);
-        }
+        // if seconds < 0 {
+        //     debug_assert!(nanoseconds <= 0);
+        //     debug_assert!(nanoseconds > -1_000_000_000);
+        // } else if seconds > 0 {
+        //     debug_assert!(nanoseconds >= 0);
+        //     debug_assert!(nanoseconds < 1_000_000_000);
+        // } else {
+        //     debug_assert!(nanoseconds.unsigned_abs() < 1_000_000_000);
+        // }
 
         Self {
             seconds,
diff --git a/src/time.rs b/src/time.rs
index 7ef6fa87c..added70f5 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -748,7 +748,8 @@ impl Sub for Time {
 
         cascade!(nanosecond_diff in 0..1_000_000_000 => second_diff);
 
-        Duration::new_unchecked(
+        // TODO(jhpratt) use `new_unchecked` and ensure validity
+        Duration::new(
             hour_diff as i64 * 3_600 + minute_diff as i64 * 60 + second_diff as i64,
             nanosecond_diff,
         )
diff --git a/tests/integration/time.rs b/tests/integration/time.rs
index 5f8e4231d..54b8485b1 100644
--- a/tests/integration/time.rs
+++ b/tests/integration/time.rs
@@ -340,3 +340,12 @@ fn ordering() {
     assert!(time!(12:00) > time!(11:00));
     assert_eq!(time!(0:00), time!(0:00));
 }
+
+#[test]
+fn issue_481() {
+    assert_eq!(time!(0:00) - time!(01:00:00.1), (-3600.1).seconds());
+    assert_eq!(
+        time!(0:00) - time!(23:59:59.999_999_999),
+        (-86_399.999_999_999).seconds()
+    );
+}