diff --git a/nssa/core/src/circuit_io.rs b/nssa/core/src/circuit_io.rs
index 9f4b1255..8df87fcc 100644
--- a/nssa/core/src/circuit_io.rs
+++ b/nssa/core/src/circuit_io.rs
@@ -103,7 +103,7 @@ mod tests {
                 ),
                 [0xab; 32],
             )],
-            block_validity_window: (Some(1_u64), None).try_into().unwrap(),
+            block_validity_window: (1..).try_into().unwrap(),
             timestamp_validity_window: TimestampValidityWindow::new_unbounded(),
         };
         let bytes = output.to_bytes();