diff --git a/src/historian.rs b/src/historian.rs
index b44fabece9..3fdeee4d78 100644
--- a/src/historian.rs
+++ b/src/historian.rs
@@ -113,7 +113,7 @@ mod tests {
         let (input, event_receiver) = channel();
         let zero = Hash::default();
         let hist = Historian::new(event_receiver, &zero, Some(20));
-        sleep(Duration::from_millis(300));
+        sleep(Duration::from_millis(900));
         input.send(Signal::Tick).unwrap();
         drop(input);
         let entries: Vec<Entry> = hist.entry_receiver.lock().unwrap().iter().collect();