diff --git a/relay-server/src/services/buffer/mod.rs b/relay-server/src/services/buffer/mod.rs
index 1b625e1b21..3936c4073c 100644
--- a/relay-server/src/services/buffer/mod.rs
+++ b/relay-server/src/services/buffer/mod.rs
@@ -142,7 +142,9 @@ impl EnvelopeBufferService {
         buffer: &mut PolymorphicEnvelopeBuffer,
     ) -> Result<(), SendError> {
         self.system_ready(buffer).await;
-        tokio::time::sleep(self.sleep).await;
+        if self.sleep > Duration::ZERO {
+            tokio::time::sleep(self.sleep).await;
+        }
         if let Some(project_cache_ready) = self.project_cache_ready.as_mut() {
             project_cache_ready.await?;
             self.project_cache_ready = None;