diff --git a/src/authres.rs b/src/authres.rs
index 51f7eb9fa..d1a31636f 100644
--- a/src/authres.rs
+++ b/src/authres.rs
@@ -666,6 +666,10 @@ Authentication-Results: box.hispanilandia.net; spf=pass smtp.mailfrom=adbenitez@
 
         tcm.section("An attacker, bob2, sends a from-forged email to Alice!");
 
+        // Sleep to make sure key reset is ignored because of DKIM failure
+        // and not because reordering is suspected.
+        tokio::time::sleep(std::time::Duration::from_millis(1100)).await;
+
         let bob2 = tcm.unconfigured().await;
         bob2.configure_addr("bob@example.net").await;
         e2ee::ensure_secret_key_exists(&bob2).await?;