# must fail: timed_OS_clock_never_ticked timed_OS_clock_ticked_0 timed_OS_clock_stepped_back
# a response does not carry the clock, so the base is stamped with the last tick (session::FetchSession::on_response)
diff --git a/wai/wai-rs/src/http_binding/session.rs b/wai/wai-rs/src/http_binding/session.rs
index ec31518e..8b35b343 100644
--- a/wai/wai-rs/src/http_binding/session.rs
+++ b/wai/wai-rs/src/http_binding/session.rs
@@ -463,7 +463,7 @@ impl FetchSession {
     /// range requested are kept, whatever else a `200` carries: no refinement's response
     /// touches its base's bytes.
     pub fn on_response(&mut self, id: u32, meta: &ResponseMeta, body: &[u8], now_ms: u64) -> Result<(), RangeRefusal> {
-        self.now_ms = now_ms;
+        let _ = now_ms;
         if let Some(Err(e)) = &self.result {
             return Err(e.clone());
         }