diff --git a/src/tests.rs b/src/tests.rs
index b782685c0cf..63c5563c01b 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,4 +1,5 @@
 #![cfg(test)]
+#![allow(static_mut_refs)]
 use chacha20::ChaCha20;
 
 use crate::types::*;