# must fail: timed_OS_base_ready_first timed_OS_clock_never_ticked timed_OS_clock_saturates
# tick never abandons a refinement past its deadline (session::FetchSession::tick)
diff --git a/wai/wai-rs/src/http_binding/session.rs b/wai/wai-rs/src/http_binding/session.rs
index ec31518e..6a10e5a6 100644
--- a/wai/wai-rs/src/http_binding/session.rs
+++ b/wai/wai-rs/src/http_binding/session.rs
@@ -397,6 +397,9 @@ impl FetchSession {
     /// the end of `u64` gives a deadline at `u64::MAX`.
     pub fn tick(&mut self, now_ms: u64) -> Vec<u32> {
         self.now_ms = now_ms;
+        if self.policy.refinement_deadline_ms.is_some() {
+            return Vec::new();
+        }
         let (Some(at), Some(d)) = (self.base_ready_at(), self.policy.refinement_deadline_ms) else { return Vec::new() };
         if self.result.is_some() || now_ms < at.saturating_add(u64::from(d)) {
             return Vec::new();