diff --git a/src/thin_client.rs b/src/thin_client.rs
index dee3d936cc..cf4b373561 100644
--- a/src/thin_client.rs
+++ b/src/thin_client.rs
@@ -332,11 +332,11 @@ impl ThinClient {
     pub fn poll_for_signature(&mut self, signature: &Signature) -> io::Result<()> {
         let now = Instant::now();
         while !self.check_signature(signature) {
-            if now.elapsed().as_secs() > 4 {
+            if now.elapsed().as_secs() > 15 {
                 // TODO: Return a better error.
                 return Err(io::Error::new(io::ErrorKind::Other, "signature not found"));
             }
-            sleep(Duration::from_millis(500));
+            sleep(Duration::from_millis(250));
         }
         Ok(())
     }
diff --git a/tests/multinode.rs b/tests/multinode.rs
index c0803106a2..d51181d089 100644
--- a/tests/multinode.rs
+++ b/tests/multinode.rs
@@ -2015,7 +2015,6 @@ fn test_fullnode_rotate(
                 .transfer(500, &mint_keypair, bob, &client_last_id)
                 .unwrap();
             debug!("transfer send, signature is {:?}", signature);
-            std::thread::sleep(std::time::Duration::from_millis(100));
             client.poll_for_signature(&signature).unwrap();
             debug!("transfer signature confirmed");
             let actual_bob_balance =
@@ -2030,7 +2029,6 @@ fn test_fullnode_rotate(
             } else {
                 trace!("waiting for leader to reach max tick height...");
             }
-            sleep(Duration::from_millis(100));
         }
     }